Journal of Medical Ultrasound最新文献

{"title":"Feasibility of Ultrasonic Heating through Skull Phantom Using Single-element Transducer.","authors":"Anastasia Antoniou, Christakis Damianou","doi":"10.4103/jmu.jmu_3_23","DOIUrl":"https://doi.org/10.4103/jmu.jmu_3_23","url":null,"abstract":"<p><strong>Background: </strong>Noninvasive neurosurgery has become possible through the use of transcranial focused ultrasound (FUS). This study assessed the heating ability of single element spherically focused transducers operating at 0.4 and 1.1 MHz through three-dimensional (3D) printed thermoplastic skull phantoms.</p><p><strong>Methods: </strong>Phantoms with precise skull bone geometry of a male patient were 3D printed using common thermoplastic materials following segmentation on a computed tomography head scan image. The brain tissue was mimicked by an agar-based gel phantom developed in-house. The selection of phantom materials was mainly based on transmission-through attenuation measurements. Phantom sonications were performed through water, and then, with the skull phantoms intervening the beam path. In each case, thermometry was performed at the focal spot using thermocouples.</p><p><strong>Results: </strong>The focal temperature change in the presence of the skull phantoms was reduced to less than 20 % of that recorded in free field when using the 0.4 MHz transducer, whereas the 1.1 MHz trans-skull sonication produced minimal or no change in focal temperature. The 0.4 MHz transducer showed better performance in trans-skull transmission but still not efficient.</p><p><strong>Conclusion: </strong>The inability of both tested single element transducers to steer the beam through the high attenuating skull phantoms and raise the temperature at the focus was confirmed, underlying the necessity to use a correction technique to compensate for energy losses, such those provided by phased arrays. The proposed phantom could be used as a cost-effective and ergonomic tool for trans-skull FUS preclinical studies.</p>","PeriodicalId":45466,"journal":{"name":"Journal of Medical Ultrasound","volume":"32 1","pages":"32-40"},"PeriodicalIF":1.1,"publicationDate":"2023-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11040484/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140871562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Landmark-guided versus Real-time Ultrasound-guided Combined Spinal-epidural Anesthesia Techniques: Paramedian Sagittal Oblique and Transverse Interlaminar Approach.","authors":"Korgün Ökmen, Durdu Kahraman Yıldız","doi":"10.4103/jmu.jmu_22_23","DOIUrl":"https://doi.org/10.4103/jmu.jmu_22_23","url":null,"abstract":"<p><strong>Background: </strong>There are different types of real-time ultrasound (US)-guided combined spinal epidural (CSE) anesthesia techniques. We aimed to investigate the effect of real-time US-guided paramedian sagittal oblique (PSO), transverse interlaminar (TI) approach method, and landmark-guided (LG) CSE anesthesia.</p><p><strong>Methods: </strong>Ninety patients who underwent CSE block were included in the study. Patients were randomized into LG (<i>n</i> = 30), PSO (<i>n</i> = 30), and TI (<i>n</i> = 30) groups. The primary outcome was number of needle manipulations. The secondary outcomes are the number of attempts, needle visibility, procedure time, procedure success rate, catheter placement difficulty, posterior complex distance, and complications.</p><p><strong>Results: </strong>The number of needle manipulations was statistically significantly lower in the LG technique group (<i>P</i> < 0.000). When the number of attempts, the difficulty of catheter placement, and the procedure's success rate were compared between the three groups, we did not find a statistically significant difference (<i>P</i> > 0.05). In addition, when the procedure times were compared, the time measured for the LG group was statistically significantly lower than in the PSO and TI groups (<i>P</i> < 0.000).</p><p><strong>Conclusion: </strong>In the results of this study, the real-time US-guided CSE anesthesia application had a similar success and complication level with LG technique. The LG method had a shorter processing time and fewer needle manipulations.</p>","PeriodicalId":45466,"journal":{"name":"Journal of Medical Ultrasound","volume":"32 1","pages":"55-61"},"PeriodicalIF":1.1,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11040487/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140858605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uterine Artery Pseudoaneurysm after Total Abdominal Hysterectomy Managed by Ultrasound-guided Percutaneous Glue Injection.","authors":"Yangala Sudha Devi, Ranjan Kumar Patel, Tara Prasad Tripathy, Saubhagya Jena","doi":"10.4103/jmu.jmu_31_23","DOIUrl":"10.4103/jmu.jmu_31_23","url":null,"abstract":"<p><p>Uterine artery pseudoaneurysm (UAP) following abdominal hysterectomy is an uncommon complication. However, it can cause life-threatening bleeding, necessitating early diagnosis and intervention. Imaging is vital in its prompt diagnosis and aids in planning interventions. Here, we describe a case of recurrent massive per-vaginal bleeding from a left UAP developed following total abdominal hysterectomy and bilateral salpingo-oophorectomy. Bleeding was successfully managed with percutaneous ultrasound-guided glue (N-butyl cyanoacrylate) injection into the aneurysmal sac. The patient is doing well without any recurrent bleeding.</p>","PeriodicalId":45466,"journal":{"name":"Journal of Medical Ultrasound","volume":"32 3","pages":"252-254"},"PeriodicalIF":0.9,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11414945/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142298169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fetal Gestational Age Estimation Using Ultrasonic Transverse Cerebellar Diameter in a Sub-Saharan African Population.","authors":"Akeem Olajide Adelabu, Temitope Olugbenga Bello, Bukunmi Michael Idowu, Victor Olufemi Oyedepo","doi":"10.4103/jmu.jmu_116_22","DOIUrl":"https://doi.org/10.4103/jmu.jmu_116_22","url":null,"abstract":"<p><strong>Background: </strong>To explore the relationship between fetal Transverse Cerebellar Diameter (TCD) and menstrual gestational age (GA) and to generate normative references (nomogram) of the fetal TCD in some pregnant women in Southwest Nigeria.</p><p><strong>Methods: </strong>Four hundred pregnant women with a singleton fetus between 14 and 38 weeks GA were enrolled. The TCD and other biometric parameters (biparietal diameter, head circumference, abdominal circumference, and femur length) as well as the cerebellar appearance were analyzed and correlated with the GA.</p><p><strong>Results: </strong>The mean TCD increased from 13.3 ± 0.3 mm at 14 weeks to 52.3 ± 3.3 mm at 38 weeks of pregnancy. A strong positive correlation was observed between TCD and GA, which was best represented by a linear regression equation: Predicted GA = 0.557 × TCD + 8.840. The regression analysis indicated a statistically significant strong positive relationship between TCD and GA (<i>r</i> = 0.972 and <i>P</i> < 0.001). The cerebellar appearance based on shape and echogenicity was graded into Grade I: 230 fetuses (57.5%); Grade II: 74 fetuses (18.5%) and Grade III: 96 fetuses (24.0%). Median GA and TCD were 21 weeks and 21.2 mm for Grade I; 29 weeks and 35.5 mm for Grade II; and 35 weeks and 48.1 mm for Grade III, respectively.</p><p><strong>Conclusion: </strong>The TCD increased in a linear fashion with advancing GA in the evaluated fetuses. The TCD is, therefore, a good marker for GA estimation. There is a gradual ultrasonographic change in fetal cerebellar appearance with advancing gestation.</p>","PeriodicalId":45466,"journal":{"name":"Journal of Medical Ultrasound","volume":"32 1","pages":"41-47"},"PeriodicalIF":1.1,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11040476/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140858464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cold Abscess of Bilateral Parotids: Delusion or Reality?","authors":"Chaitra Udagi, Pooja Jaisinghani, Rasika Waghmare, Tushar Patil","doi":"10.4103/jmu.jmu_108_22","DOIUrl":"10.4103/jmu.jmu_108_22","url":null,"abstract":"<p><p>Tuberculosis being endemic in country like India can affect any organ though pulmonary tuberculosis is rampant and extrapulmonary is rare. Tuberculosis affecting parotid gland is a rare occurrence, usually unilateral. However, Mycobacterium tuberculosis causing cold abscess in bilateral parotid glands is even rarer. Here, we present a case of a young female presented with bilateral slow-growing swelling in the parotid region with evening raise of temperature for two months. On clinical examination, no signs of inflammation were seen. Ultrasonography showed thick-walled hypoechoic collection with septae and internal echoes within involving both superficial and deep lobes of the parotid gland. Fine-needle aspiration cytology (FNAC) suggested a caseating granuloma and acid fast bacilli were detected on ZN staining, thereby confirming the diagnosis of cold abscess. She was put on antitubercular drugs and there was a drastic reduction in the size of swelling.</p>","PeriodicalId":45466,"journal":{"name":"Journal of Medical Ultrasound","volume":"32 2","pages":"175-178"},"PeriodicalIF":1.1,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11175372/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141332174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Paraneural Sciatic Sheaths in Longitudinal Axis at the Level of Greater Trochanter: An Ultrasound Cadaveric and Clinical Correlation Study.","authors":"Sandeep Diwan, Georg Feigl, Abhijit Nair, Parag Sancheti","doi":"10.4103/jmu.jmu_121_22","DOIUrl":"10.4103/jmu.jmu_121_22","url":null,"abstract":"<p><strong>Background: </strong>Paraneural sheath engulfing the sciatic nerve (SN) between the ischial tuberosity and the greater trochanter is well known.</p><p><strong>Methods: </strong>In order to explore the anatomical planes separating the paraneurium from the epineurium in SN, we conducted a cadaveric study (two patients and four specimens), followed by a clinical study in 10 patients.</p><p><strong>Results: </strong>We demonstrated an elevation of 5-7 layers of paraneural tissues after an in-plane injection in the longitudinal axis of the proximal SN, which was possibly the last of the paraneural sheath. In the clinical study, the block provided low pain scores with no rescue analgesia postoperatively and no neurological deficit at the time of discharge.</p><p><strong>Conclusion: </strong>This is probably the first series which has described the elevation of several layers of paraneural tissues after an in-plane injection in the longitudinal axis of the proximal SN.</p>","PeriodicalId":45466,"journal":{"name":"Journal of Medical Ultrasound","volume":"31 4","pages":"305-308"},"PeriodicalIF":0.9,"publicationDate":"2023-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10802874/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139543286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasound Color Pattern of Colonic Hamartomatous Polyps.","authors":"Chih-Hsuan Chen,&nbsp;Yang-Yuan Chen,&nbsp;Hsu-Heng Yen","doi":"10.4103/jmu.jmu_161_21","DOIUrl":"https://doi.org/10.4103/jmu.jmu_161_21","url":null,"abstract":"<p><p>Colonic hamartomatous polyps are clinically benign tumors. Colonic hamartomas are polypoid lesions that are rare in adults and most commonly encountered in infants and children. We report an unusual case of giant colonic hamartomatous polyps that were found incidentally during a medical workup for acute lower gastrointestinal bleeding in a 26-year-old woman. We present the color Doppler ultrasound, computed tomography scan, and endoscopic pattern of colonic hamartomatous polyps.</p>","PeriodicalId":45466,"journal":{"name":"Journal of Medical Ultrasound","volume":"31 2","pages":"144-146"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/63/66/JMU-31-144.PMC10413393.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10352044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adenomatoid Tumor of Epididymis Associated with Tubular Ectasia of Rete Testis: Sonographic Evaluation.","authors":"Suresh Vasant Phatak,&nbsp;Megha Manoj,&nbsp;Pratik Jayprakash Bhansali,&nbsp;Prasanthi Ghanta","doi":"10.4103/jmu.jmu_10_22","DOIUrl":"https://doi.org/10.4103/jmu.jmu_10_22","url":null,"abstract":"<p><p>Paratesticular tumors are a relatively rare group of mesenchymal tumors, accounting for 7%-10% of all intrascrotal tumors. Adenomatoid tumor of the epididymis is the most common epididymal tumor. It is difficult to distinguish intra- versus paratesticular tumors and to know the nature of the lesion (benign versus malignant) on clinical examination since they may have similar presentation; therefore, ultrasound examination of these lesions is required to demonstrate its extratesticular location and also to suggest its benign nature. Elastography can further help in characterizing the lesion by evaluating the stiffness of the tumor. Here, we present a case of adenomatoid tumor of the left epididymis with tubular ectasia of the rete testis.</p>","PeriodicalId":45466,"journal":{"name":"Journal of Medical Ultrasound","volume":"31 2","pages":"157-159"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/21/a8/JMU-31-157.PMC10413400.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10371462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Incorporating Multiorgan Point-of-care Ultrasound into Obstetric Emergency Treatment Protocols.","authors":"Po-Jen Cheng,&nbsp;Nin-Chieh Hsu","doi":"10.4103/jmu.jmu_35_23","DOIUrl":"https://doi.org/10.4103/jmu.jmu_35_23","url":null,"abstract":"introduCtion Medical history records and physical examinations involving the inspection, palpation, percussion, and auscultation of different organs play an essential role in the decision-making process for disease diagnosis, management, and intervention in clinical medicine. However, advances in biomedicine and mechanical technology have led to an increasing number of traditional clinical examination methods being replaced. For example, medical ultrasound is being increasingly applied in various medical specialties. Bedside point-of-care ultrasonography (POCUS) performed by a clinician is often used to answer focused clinical questions instantly and to support decision-making in patient management.[1] In emergency and critical care medical settings, POCUS applied for patient examination primarily includes cardiac, lung, and abdominal ultrasounds used for the clinical assessment of specific symptoms or signs such as hypotension, shock, dyspnea, or chest pain.[2] Numerous structured protocols incorporating multiorgan POCUS (MOPOCUS) have also been proposed to guide assessment processes. In obstetrics and gynecology, a high-risk pregnancy can quickly develop into an obstetric emergency requiring urgent intensive care. However, although medical ultrasound is extensively applied in clinical obstetrics for maternal–fetal health care, POCUS protocols established in this field are generally limited to only the imaging of the fetus and pelvic organs. The incorporation of maternal POCUS into critical obstetric settings has the potential for preventing cardiovascular-associated maternal mortality.[3] This thus indicates that maternal POCUS should be incorporated into baseline obstetric ultrasound to ensure the more efficient diagnosis, treatment, and evaluation of obstetric emergencies; doing so can ensure that high-risk pregnant women obtain the same standard of care as their nonpregnant critical counterparts. Accordingly, the objective of this article is to present an avant-garde perspective on the incorporation of MOPOCUS into structured routine care protocols for the management of major obstetric emergencies, including postpartum hemorrhage (PPH), preeclampsia, and maternal sepsis; this can help clinicians and researchers more clearly understand the applicability of MOPOCUS in the clinical decision-making process for the management of obstetric emergencies.","PeriodicalId":45466,"journal":{"name":"Journal of Medical Ultrasound","volume":"31 2","pages":"83-85"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/1e/f6/JMU-31-83.PMC10413410.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9989958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Humeral Length versus Femur Length for Estimating Fetal Age in the Third Trimester Using Ultrasound among Saudi Fetuses.","authors":"Mahasin G Hassan","doi":"10.4103/jmu.jmu_26_22","DOIUrl":"https://doi.org/10.4103/jmu.jmu_26_22","url":null,"abstract":"<p><strong>Background: </strong>Ethnicity can influence organ measurements, so each ethnicity should provide normal references. The study was conducted to measure the normal ranges of humeral and femoral diaphysis lengths, to compare them during the third trimester of pregnancy in the Saudi population, and to identify their role in estimating fetal age.</p><p><strong>Methods: </strong>This cross-sectional study was conducted among 60 normal singleton pregnant females in the third trimester. The fetal humeral length (HL) and femur length (FL) were taken during ultrasound scanning for follow-up. The IBM Statistical Package for the Social Sciences Version 23 was used to summarize the data and to compare both the lengths with the last menstrual period (LMP) using Pearson's correlation. The comparison was considered statistically significant if <i>P</i> < 0.05.</p><p><strong>Results: </strong>The mean humeral and femoral diaphysis lengths ± standard deviations were 4.84 ± 1 cm and 5.54 ± 1.2 cm, respectively. A positive linear correlation was present between the length and LMP. The correlation of HL with LMP (<i>r</i> = 0.828) was higher than that of FL with LMP (<i>r</i> = 0.770). HL and FL were correlated. They showed a Pearson's coefficient of 0.941. The study revealed that gender does not affect fetal HL and FL.</p><p><strong>Conclusion: </strong>Normal reference ranges for femur and humeral diaphysis lengths during the third trimester were provided. The humerus can be used to assess fetal age. Humerus and femur were correlated to each other among Saudi fetuses. Another study with a larger sample size is recommended.</p>","PeriodicalId":45466,"journal":{"name":"Journal of Medical Ultrasound","volume":"31 2","pages":"133-136"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a1/bc/JMU-31-133.PMC10413399.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9998735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}