Veterinary Radiology & Ultrasound最新文献

{"title":"Comparative analysis of ocular biometry, ocular protrusion, and palpebral fissure dimensions in brachycephalic and nonbrachycephalic dog breeds","authors":"Nuanwan Rujirekasuwan, Panpicha Sattasathuchana, Wutthiwong Theerapan, Naris Thengchaisri","doi":"10.1111/vru.13351","DOIUrl":"https://doi.org/10.1111/vru.13351","url":null,"abstract":"This study compared skull morphology and ocular parameters in brachycephalic (BC, <jats:italic>n </jats:italic>= 16) and nonbrachycephalic (NB, <jats:italic>n</jats:italic> = 16) dogs using head CT scans. The results of a Schirmer tear test I (STT I), intraocular pressure (IOP), ocular biometry, external structure, ocular protrusion, and palpebral fissure dimensions were evaluated and compared between BC and NB dogs. There were no statistically significant differences in the STT I results, IOP, globe dimensions, globe volume, internal structure, and external structure between BC and NB dogs (<jats:italic>P </jats:italic>&gt; .05). Brachycephalic dogs exhibited significantly greater ocular protrusion and significantly larger palpebral fissure dimensions compared with NB dogs. For all dogs, we found a strong positive correlation between globe volume and body weight (<jats:italic>r</jats:italic> = 0.836, <jats:italic>P </jats:italic>= .0000). The globe volumes, external structure parameters, and ocular protrusion were normalized by body weight and were also significantly larger in BC dogs compared with NB dogs (<jats:italic>P</jats:italic> &lt; .001). The ocular protrusion (<jats:italic>r</jats:italic> = 0.521, <jats:italic>P </jats:italic>&lt; .0000) and horizontal palpebral fissure (<jats:italic>r</jats:italic> = 0.372, <jats:italic>P </jats:italic>= .0024) showed a moderate positive correlation with the cephalic index (CI). Additionally, normalized globe volume (<jats:italic>r</jats:italic> = 0.435, <jats:italic>P </jats:italic>= .0003), normalized orbital depth (<jats:italic>r</jats:italic> = 0.419, <jats:italic>P </jats:italic>= .0005), and normalized retrobulbar depth (<jats:italic>r</jats:italic> = 0.444, <jats:italic>P </jats:italic>= .0002) had a moderate positive correlation with the CI. The study emphasizes how the distinctive skull structure of BC dogs, with shortened facial bones and thickened retrobulbar soft tissue, influences their ocular appearance and raises the risk of eye problems.","PeriodicalId":23581,"journal":{"name":"Veterinary Radiology & Ultrasound","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140834399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A survey of the use of ultrasound by small animal veterinary clinicians","authors":"Kendra A. Zelachowski, Mark Rishniw, Teresa C. DeFrancesco","doi":"10.1111/vru.13377","DOIUrl":"https://doi.org/10.1111/vru.13377","url":null,"abstract":"This study aimed to determine the current use of ultrasound amongst small animal veterinarians. A total of 1216 small animal veterinary practitioners responded to an electronic survey that was administered through the Veterinary Information Network to all its members. Descriptive statistics were generated; limited inferential statistics were performed to examine specific relationships. Eighty‐four percent of respondents had access to an ultrasound unit, and 86% of respondents reported using their unit multiple times per week. The most common uses were assistance with cystocentesis (93%) and abdominocentesis (71%), pregnancy diagnosis (69%), limited abdominal evaluation (63%), to aid in thoracocentesis (59%), and limited thoracic evaluation (52%). Eighty‐nine percent of respondents received some formal training in ultrasound, most commonly from continuing education courses. Most respondents (52%) reported receiving ≤25 h of training. Additionally, 88% of respondents believed it was either extremely or very important for there to be ultrasound training for veterinary students prior to graduation. Based on this survey, most small animal practitioners commonly use ultrasound for limited examinations, being most confident in the sonographic evaluation and centesis of the bladder and for the detection and centesis of effusion in a body cavity. With most respondents having ≤25 h of training in ultrasound, typically obtained in postgraduate courses, an expansion in standardized basic ultrasound training within the veterinary curriculum may be warranted.","PeriodicalId":23581,"journal":{"name":"Veterinary Radiology & Ultrasound","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140806207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Classification of the quality of canine and feline ventrodorsal and dorsoventral thoracic radiographs through machine learning","authors":"Peyman Tahghighi, Ryan B. Appleby, Nicole Norena, Eran Ukwatta, Amin Komeili","doi":"10.1111/vru.13373","DOIUrl":"https://doi.org/10.1111/vru.13373","url":null,"abstract":"Thoracic radiographs are an essential diagnostic tool in companion animal medicine and are frequently used as a part of routine workups in patients presenting for coughing, respiratory distress, cardiovascular diseases, and for staging of neoplasia. Quality control is a critical aspect of radiology practice in preventing misdiagnosis and ensuring consistent, accurate, and reliable diagnostic imaging. Implementing an effective quality control procedure in radiology can impact patient outcomes, facilitate clinical decision‐making, and decrease healthcare costs. In this study, a machine learning‐based quality classification model is suggested for canine and feline thoracic radiographs captured in both ventrodorsal and dorsoventral positions. The problem of quality classification was divided into collimation, positioning, and exposure, and then an automatic classification method was proposed for each based on deep learning and machine learning. We utilized a dataset of 899 radiographs of dogs and cats. Evaluations using fivefold cross‐validation resulted in an F1 score and AUC score of 91.33 (95% CI: 88.37–94.29) and 91.10 (95% CI: 88.16–94.03), respectively. Results indicated that the proposed automatic quality classification has the potential to be implemented in radiology clinics to improve radiograph quality and reduce nondiagnostic images.","PeriodicalId":23581,"journal":{"name":"Veterinary Radiology & Ultrasound","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140799512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prospective pilot study utilizing changes in quantitative values obtained on serial fluorine‐18 fluorodeoxyglucose (18F‐FDG) positron emission tomography–computed tomography (PET/CT) in dogs with appendicular osteosarcoma before and after stereotactic body radiation therapy (SBRT) and carboplatin chemotherapy to assess for prediction of survival and therapeutic effectiveness","authors":"Tiffany W. Martin, Lynn Griffin","doi":"10.1111/vru.13361","DOIUrl":"https://doi.org/10.1111/vru.13361","url":null,"abstract":"Serial fluorine 18 fluorodeoxyglucose (<jats:sup>18</jats:sup>F‐FDG) positron emission tomography–CT (PET/CT) is commonly used in human oncology to prognosticate and evaluate for therapeutic effectiveness. In this pilot study, dogs with naturally occurring appendicular osteosarcoma were evaluated with serial <jats:sup>18</jats:sup>F‐FDG PET/CT in an attempt to assess for response to therapy, prognostic factors, and appropriateness of imaging intervals. Fourteen dogs were enrolled in the trial. All dogs had the initial <jats:sup>18</jats:sup>F‐FDG PET/CT (PET1), with nine dogs having their end‐of‐therapy <jats:sup>18</jats:sup>F‐FDG PET/CT (EoT PET) 3 months after stereotactic body radiation therapy (SBRT) to the primary tumor. The median percent change from the PET1 to the EoT PET for the standard uptake value maximum (SUV<jats:sub>max%</jats:sub>) was −58% (range: −17 to −88%), metabolic tumor volume (MTV<jats:sub>%</jats:sub>) was −99.8% (range: −65 to −100%), and total lesion glycolysis (TLG<jats:sub>%</jats:sub>) was −99.8% (range: −75 to −100%), all of which were significant (<jats:italic>P</jats:italic> &lt; .05, &lt;.05, and &lt;.05, respectively). On evaluation, it was found that volumes of GTV and CTV were significant for survival (<jats:italic>P</jats:italic> &lt; .05 and &lt;.05), MTV<jats:sub>1</jats:sub>, TLG<jats:sub>1</jats:sub>, and SUV<jats:sub>max</jats:sub> on the EoT PET (SUV<jats:sub>maxEoT</jats:sub>) were predictive of metastasis (<jats:italic>P</jats:italic> &lt; .05), and the SUV<jats:sub>max%</jats:sub> was significantly correlated to the time to first event (<jats:italic>P</jats:italic> &lt; .05). Based on this data, serial <jats:sup>18</jats:sup>F‐FDG PET/CT performed 3 months after SBRT can show a significant reduction in avidity, and the quantitative data collected may help predict metastatic disease in canine appendicular osteosarcoma.","PeriodicalId":23581,"journal":{"name":"Veterinary Radiology & Ultrasound","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140806258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computed tomographic features of exocrine pancreatic carcinomas in dogs and cats","authors":"Alexandra Dunn, Sangeeta Rao, Brian Husbands, Nicholas Petrovitch, Samantha Loeber, Tobias Schwarz, Kelsey Cline, Wilfried Mai, Heather Spain, Kaitlin Curran, Kate Vickery, Angela Marolf","doi":"10.1111/vru.13370","DOIUrl":"https://doi.org/10.1111/vru.13370","url":null,"abstract":"Exocrine pancreatic carcinomas are uncommon in dogs and cats, and diagnosis with diagnostic imaging can be challenging. This retrospective, multi‐institutional, descriptive study was performed to evaluate the CT features of exocrine pancreatic carcinomas. The CT examinations of 18 dogs and 12 cats with exocrine pancreatic carcinomas diagnosed by cytology or histopathology were reviewed. The CT features of exocrine pancreatic carcinomas included a well‐defined mass in 28/30 (93%) with contrast enhancement in 27/30 (90%), commonly heterogeneous 22/30 (73%); often with a nonenhancing fluid to soft tissue attenuating center 12/30 (40%). The right lobe of the pancreas was the most common location, 14/30 (47%), then the left lobe, 10/30 (33%), and the body, 6/30 (20%). Extrahepatic biliary duct dilation was present in six animals; 5/6 (83%) of the masses were located in the right pancreatic lobe. Additional findings included peripancreatic fat‐stranding 17/30 (57%), lymphadenopathy 16/30 (57%), peripancreatic soft tissue nodules 12/30 (40%), and free fluid 10/30 (33%). When comparing the imaging features of dogs and cats, there was a large overlap in imaging characteristics. There was a significant difference between the height of the masses, with dogs having larger masses (<jats:italic>P</jats:italic>‐value.0028). Lymphadenopathy was more likely in larger masses [increased height (<jats:italic>P</jats:italic>‐value.029)]. Cats were significantly older than dogs (<jats:italic>P</jats:italic>‐value.0355). Pancreatic carcinomas were commonly identified as masses with heterogeneous contrast enhancement and a nonenhancing fluid to soft tissue attenuating center with concurrent peripancreatic changes (fat‐stranding and/or soft tissue nodules) and lymphadenopathy.","PeriodicalId":23581,"journal":{"name":"Veterinary Radiology & Ultrasound","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140799517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pulmonary interstitial emphysema and spontaneous pneumomediastinum are more prevalent in sighthounds than other dog breeds undergoing thoracic CT","authors":"César Sánchez Jiménez, Imogen Schofield, Mark Plested","doi":"10.1111/vru.13369","DOIUrl":"https://doi.org/10.1111/vru.13369","url":null,"abstract":"Spontaneous pneumomediastinum is an uncommon condition described in veterinary medicine with concurrent respiratory disease. It can be caused by the Macklin effect, which is when gas leaks from the alveoli into the surrounding interstitial lung tissue. Pulmonary interstitial emphysema (PIE) is the presence of gas within the pulmonary vascular sheaths and indicates the presence of the Macklin effect. In the authors’ experience, spontaneous pneumomediastinum and PIE are more prevalent in sighthound dogs than in other breeds and are often considered incidental findings. This retrospective, observational, cross-sectional study compared the prevalence of PIE and subsequent pneumomediastinum in sighthound with other purebred dogs. It characterized the appearance of PIE in CT and analyzed a possible association with concomitant pulmonary pathologies or with the use of general anesthesia. Medical records and thoracic CTs of sighthounds and nonsighthound dogs from two institutions were reviewed. A total of 256 dogs, comprising 127 sighthounds and 129 other purebred dogs, were included. The prevalence of PIE and pneumomediastinum was statistically higher in sighthound (14.2%) compared with other nonsighthound dogs (2.2%). There was no statistical association between the presence of PIE and pneumomediastinum with different age and weight groups or with sex. There was no statistical difference in the prevalence of PIE and pneumomediastinum between dogs with and without pulmonary pathology or in dogs undergoing CT with sedation or general anesthesia. Spontaneous pneumomediastinum in sighthounds is more prevalent than in other breeds, and its prevalence is not associated with the presence of pulmonary pathology or the use of general anesthesia.","PeriodicalId":23581,"journal":{"name":"Veterinary Radiology & Ultrasound","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140563905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasonographic measurements of the normal adrenal glands in guinea pigs (Cavia Porcellus)","authors":"Domenico Sainato, Tina Pelligra, Caterina Puccinelli, Daniele Petrini, Simonetta Citi","doi":"10.1111/vru.13367","DOIUrl":"https://doi.org/10.1111/vru.13367","url":null,"abstract":"Hyperadrenocorticism is an uncommon but important endocrine disease in guinea pigs, but due to its subtle clinical signs and the limited information in veterinary literature, it can be underdiagnosed or misdiagnosed. Ultrasound of the adrenal glands in patients with suspected hyperadrenocorticism can help in identifying adrenomegaly. The purpose of this prospective study was to identify ultrasonographic adrenal gland dimensions in presumed healthy guinea pigs using the same standardized method described for dogs and cats. A conscious ultrasound scan was conducted on twenty client‐owned, presumed healthy guinea pigs, and their adrenal glands were measured. A possible correlation between adrenal dimensions with age, sex, and body weight was investigated. The mean length, cranial and caudal pole thickness for the left and right adrenal glands were, respectively, 12.64 ± 2.11 mm and 11.55 ± 1.52 mm; 4.83 mm ± 1.03 mm and 4.69 ± 1.34 mm; 4.8 ± 1.23 mm and 4.04 ± 0.75 mm. The thickness of the left caudal pole was significantly higher than the right (<jats:italic>P</jats:italic> = 0.02). A significant positive correlation was found between the length of the left adrenal gland and both age (<jats:italic>r</jats:italic> = 0.46; <jats:italic>P</jats:italic> = .03) and weight (<jats:italic>r</jats:italic> = 0.59; <jats:italic>P</jats:italic> = .01). Statistical correlation between the thickness of each cranial and caudal pole, with age, sex, or weight, was not found. The dimensions provided could prove a useful tool in the clinical evaluation of guinea pigs with suspected hyperadrenocorticism.","PeriodicalId":23581,"journal":{"name":"Veterinary Radiology & Ultrasound","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140563904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three‐dimensional magnetic resonance cholangiography is superior to two‐dimensional single‐shot magnetic resonance cholangiography for visualization and image quality of the feline and canine biliary tract: A postmortem study","authors":"Vahideh Rahmani, Juha Peltonen, Dmitri Hmelnikov, Raimonda Uosyte, Sofia Männikkö, Thomas Spillmann, Mirja Ruohoniemi","doi":"10.1111/vru.13372","DOIUrl":"https://doi.org/10.1111/vru.13372","url":null,"abstract":"Magnetic resonance cholangiography (MRC) is an established diagnostic tool for noninvasive assessment of the biliary tract in humans. It has also been found to be feasible in companion animals, but no published studies have compared MRC sequences in veterinary medicine. The present study is part of a prospective, observational, analytical investigation on MR cholangiopancreatography performed on the donated bodies of 12 cats and eight dogs. The main aim of this study was to compare the images of 2D‐SSh‐TSE‐MRC and 3D‐TSE‐MRC sequences for visualization and image quality of the feline and canine biliary tract. Both sequences are T2‐weighted and noncontrast. Three independent readers scored the visibility of four segments of the biliary tract, namely the gallbladder (GB), cystic duct, common bile duct (CBD), and extrahepatic ducts, and the image quality of the two MRC sequences using five‐point Likert scales. Wilcoxon signed‐rank test was used to compare the scores between the MRC sequences separately for cats and dogs. Inter‐ and intraobserver agreements were measured using Gwet's AC2 with linear weighting. The 3D‐TSE‐MRC images were scored significantly higher than the 2D‐SSh‐TSE‐MRC for both visibility and image quality (<jats:italic>P </jats:italic>&lt; .001–.016 for cats, <jats:italic>P </jats:italic>= .008–.031 for dogs); the only exception was GB in dogs. In both cats and dogs, interobserver agreement for segment visibility and image quality ranged from slight to substantial in 2D‐SSh‐TSE‐MRC and from poor to almost perfect in 3D‐TSE‐MRC. Most of the assessments (73% for segment visibility and 66% for image quality) had substantial to almost perfect intraobserver agreement. Findings from the current study support the use of 3D‐TSE‐MRC over 2D‐SSh‐TSE‐MRC for evaluation of the feline and canine biliary tract, but further studies on live animals are warranted.","PeriodicalId":23581,"journal":{"name":"Veterinary Radiology & Ultrasound","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140564127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non‐brachycephalic dogs with stertor have higher nasopharyngeal collapsibility compared with dogs without stertor and foramen lacerum level is ideal for evaluating nasopharyngeal collapse on dynamic CT","authors":"Daji Noh, Hyun‐guk Shin, Hojung Choi, Youngwon Lee, Kija Lee","doi":"10.1111/vru.13371","DOIUrl":"https://doi.org/10.1111/vru.13371","url":null,"abstract":"Stertor, a clinical sign associated with obstructive airway syndrome, is often observed in non‐brachycephalic dogs. This prospective, case‐control study aimed to compare soft palate dimensions, nasopharyngeal cross‐sectional area (CSA), and nasopharyngeal collapsibility at various locations in non‐brachycephalic dogs with and without stertor. A total of 50 dogs were recruited and stratified into control (<jats:italic>n </jats:italic>= 34) and stertor (<jats:italic>n </jats:italic>= 13) groups. Static and dynamic computed tomography was conducted without tracheal intubation, and the following variables were calculated: normalized soft palate length and thickness, normalized maximum and minimum nasopharyngeal CSAs (rCSAmax and rCSAmin), and nasopharyngeal collapsibility at the level of the cranial end of the soft palate, pterygoid hamulus, foramen lacerum, bony labyrinth, and caudal end of the soft palate. The stertor group demonstrated significantly lower rCSAmax and rCSAmin, as well as higher nasopharyngeal collapsibility compared with the control group, while no significant differences were noted in the soft palate dimension. Evaluating nasopharyngeal collapse at the foramen lacerum level was recommended due to the clear presence of identifiable bony landmarks and lower overlap in the nasopharyngeal collapsibility between dogs with and without stertor. Physical dimensions of the soft palate may not be the primary contributing factor to nasopharyngeal collapse and clinical signs in non‐brachycephalic dogs.","PeriodicalId":23581,"journal":{"name":"Veterinary Radiology & Ultrasound","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140563816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prevalence of canine renal crest hyperattenuation in precontrast computed tomography","authors":"Blanca Serra‐Gomez de la Serna, Frederike Schiborra, Rachel Marwood","doi":"10.1111/vru.13368","DOIUrl":"https://doi.org/10.1111/vru.13368","url":null,"abstract":"Normal canine kidneys are relatively homogeneous soft tissue attenuating structures on nonenhanced CT images. However, visible differences in attenuation between the renal crest and medulla are occasionally observed. This finding and its potential clinical implications have not been previously investigated. This study aimed to estimate the prevalence of renal crest hyperattenuation (RCH) and investigate possible associations with signalment and laboratory parameters. Abdominal CT studies from 100 dogs, with biochemistry and urinalysis data obtained within 48 h before the CT acquisition, were categorized by two radiologists into those with and without visible RCH. The attenuation in Hounsfield units (HU) of the renal crest and renal medulla were measured. Signalment, biochemical, and urinalysis data were analyzed for associations with RCH. Correlation coefficients were calculated for measured HU and associated continuous parameters. Prevalence of RCH was 42.42% (42/99 dogs, 95% CI, 33–52%). Urinary specific gravity (USG) was significantly different between dogs with and without RCH (<jats:italic>P</jats:italic> = .034). Weak positive correlations were identified between left and right renal crest attenuation and USG (<jats:italic>r</jats:italic> = 0.233 and 0.253, respectively; <jats:italic>P</jats:italic> = .05). Renal crest hyperattenuation is a common finding in dogs undergoing abdominal CT. Although the correlation between the USG and renal crest HU is weak, the dogs with RCH have significantly higher USG. Renal crest hyperattenuation might, therefore, not be associated with renal insufficiency. No other specific associations of RCH were identified with parameters typically altered in a variety of diseases. Further investigation may be warranted for its relevance to specific diseases or if it indeed represents a physiological variant.","PeriodicalId":23581,"journal":{"name":"Veterinary Radiology & Ultrasound","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140563709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}