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Contemporary Diagnostic Radiology最新文献

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Fast MRI Techniques for Abdominal Imaging Simplified: Part 1—Making Sense of It All 简化腹部成像的快速磁共振成像技术：第 1 部分--了解一切
IF 0.1
Contemporary Diagnostic Radiology Pub Date : 2024-02-15 DOI: 10.1097/01.CDR.0001006240.88780.59
Ranu Taneja, Winfred Xi Tai Goh
{"title":"Fast MRI Techniques for Abdominal Imaging Simplified: Part 1—Making Sense of It All","authors":"Ranu Taneja, Winfred Xi Tai Goh","doi":"10.1097/01.CDR.0001006240.88780.59","DOIUrl":"https://doi.org/10.1097/01.CDR.0001006240.88780.59","url":null,"abstract":"Motion is a major limiting factor in abdominal MRI. Scan time is related to MR signal acquisition and k-space filling. K-space is the raw data matrix that stores digitized MR signal, which is Fourier transformed into an image. So rapid signal acquisition, reduced k-space filling, and partial Fourier techniques can reduce scan time. This article aims to provide a simplified explanation of the physics behind various techniques for fast abdominal MRI.","PeriodicalId":29694,"journal":{"name":"Contemporary Diagnostic Radiology","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139835334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fast MRI Techniques for Abdominal Imaging Simplified: Part 1—Making Sense of It All 简化腹部成像的快速磁共振成像技术：第 1 部分--了解一切
IF 0.1
Contemporary Diagnostic Radiology Pub Date : 2024-02-15 DOI: 10.1097/01.CDR.0001006240.88780.59
Ranu Taneja, Winfred Xi Tai Goh
{"title":"Fast MRI Techniques for Abdominal Imaging Simplified: Part 1—Making Sense of It All","authors":"Ranu Taneja, Winfred Xi Tai Goh","doi":"10.1097/01.CDR.0001006240.88780.59","DOIUrl":"https://doi.org/10.1097/01.CDR.0001006240.88780.59","url":null,"abstract":"Motion is a major limiting factor in abdominal MRI. Scan time is related to MR signal acquisition and k-space filling. K-space is the raw data matrix that stores digitized MR signal, which is Fourier transformed into an image. So rapid signal acquisition, reduced k-space filling, and partial Fourier techniques can reduce scan time. This article aims to provide a simplified explanation of the physics behind various techniques for fast abdominal MRI.","PeriodicalId":29694,"journal":{"name":"Contemporary Diagnostic Radiology","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139775629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Acute Mesenteric Ischemia: Imaging Findings and Mimics 急性肠系膜缺血：成像检查结果和模拟病例
IF 0.1
Contemporary Diagnostic Radiology Pub Date : 2024-01-31 DOI: 10.1097/01.CDR.0001004976.86399.1c
Adrian QingYu Xu, Ken Nakanote, Siddhi Hegde, Sarah Bastawrous, Alex Chan, Jennifer S. Weaver, Jonathan Revels, Sherry S. Wang
{"title":"Acute Mesenteric Ischemia: Imaging Findings and Mimics","authors":"Adrian QingYu Xu, Ken Nakanote, Siddhi Hegde, Sarah Bastawrous, Alex Chan, Jennifer S. Weaver, Jonathan Revels, Sherry S. Wang","doi":"10.1097/01.CDR.0001004976.86399.1c","DOIUrl":"https://doi.org/10.1097/01.CDR.0001004976.86399.1c","url":null,"abstract":"Acute mesenteric ischemia is a rapidly life-threatening condition in which the radiologist may play a crucial role in early diagnosis and thus improve patient outcomes. Acute mesenteric ischemia can occur from arterial embolism or thrombosis, venous occlusive, or nonocclusive etiologies. Key findings for acute arterial occlusion include hypoenhancing bowel, which is usually not thickened or dilated. Venous occlusion often results in a hyperenhancing, thickened, and dilated bowel. Nonocclusive mesenteric ischemia should be considered in the appropriate clinical context, when there is no vascular occlusion on CT, and when there is involvement of watershed regions without specific vascular territory abnormalities. Venous congestion and increased vascular permeability can result in mesenteric edema and ascites; however, it is not predictive of mesenteric ischemia severity. Pneumatosis alone may not indicate presence of nonviable bowel; however, pneumatosis with portal venous gas or pneumoperitoneum has high sensitivity for nonviable bowel. Clinical history and laboratory results can often help differentiate between acute mesenteric ischemia and its mimics, such as inflammatory bowel disease, enteritis, and radiation injury.","PeriodicalId":29694,"journal":{"name":"Contemporary Diagnostic Radiology","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139590718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Acute Mesenteric Ischemia: Anatomy, Imaging Techniques, and Pathophysiology 急性肠系膜缺血：解剖、成像技术和病理生理学
IF 0.1
Contemporary Diagnostic Radiology Pub Date : 2024-01-15 DOI: 10.1097/01.CDR.0001004620.57397.33
Adrian QingYu Xu, Ken Nakanote, Siddhi Hegde, Sarah Bastawrous, Alex Chan, Jennifer S. Weaver, Jonathan Revels, Sherry S. Wang
{"title":"Acute Mesenteric Ischemia: Anatomy, Imaging Techniques, and Pathophysiology","authors":"Adrian QingYu Xu, Ken Nakanote, Siddhi Hegde, Sarah Bastawrous, Alex Chan, Jennifer S. Weaver, Jonathan Revels, Sherry S. Wang","doi":"10.1097/01.CDR.0001004620.57397.33","DOIUrl":"https://doi.org/10.1097/01.CDR.0001004620.57397.33","url":null,"abstract":"Acute mesenteric ischemia is frequently a rapidly life-threatening condition in which the radiologist may play a crucial role in early diagnosis and thus improve patient outcome. The small and large bowels are supplied by the celiac trunk, superior mesenteric artery, and inferior mesenteric artery with watershed zones at the splenic flexure (Griffith's point) and rectosigmoid junction (Sudeck's point). Important bowel collateral circulation is the superior-inferior pancreaticoduodenal anastomosis, marginal artery of Drummond, and arc of Riolan. The most common cause of acute mesenteric ischemia is arterial embolism or thrombosis with less common causes being veno-occlusive and other nonocclusive causes. CT angiography evaluation is the first-line modality with high sensitivity and specificity for identifying acute mesenteric ischemia. Dual-energy CT is an emerging modality, which may be helpful in subtle cases.","PeriodicalId":29694,"journal":{"name":"Contemporary Diagnostic Radiology","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139437116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Placenta Accreta Spectrum on MRI 磁共振成像上的胎盘积液图谱
IF 0.1
Contemporary Diagnostic Radiology Pub Date : 2024-01-01 DOI: 10.1097/01.CDR.0000997396.64455.48
Kellie Patterson, Sarah Byun, John Hines
{"title":"Placenta Accreta Spectrum on MRI","authors":"Kellie Patterson, Sarah Byun, John Hines","doi":"10.1097/01.CDR.0000997396.64455.48","DOIUrl":"https://doi.org/10.1097/01.CDR.0000997396.64455.48","url":null,"abstract":"Placenta accreta spectrum (PAS) refers to a range of abnormally adhesive and penetrative placental tissues in the myometrium. It is critical to diagnose PAS before delivery, as maternal morbidity/mortality can occur due to life-threatening hemorrhage. Ultrasound has traditionally been the first-line imaging modality for the diagnosis of PAS; however MRI is a useful supplemental modality in the workup and is a valuable tool in cases where ultrasound is limited or equivocal. It is also indicated in further assessment of PAS in cases with a positive ultrasound diagnosis. There are three main categories of MRI findings of PAS, all of which involve disruption of the normal anatomic appearance of the placenta/myometrium and include gross morphologic signs (placental bulge, bladder wall interruption, exophytic mass, rolled-up placental edge, and placental protrusion into the cervix), interface signs (myometrial thinning, loss of T2 hypointense interface, abnormal vascularization of the placental bed, and placental infarction), and architecture signs (T2 dark bands, abnormal intraplacental vascularity, and placental heterogeneity). It is important for radiologists to be aware of these signs, and potential MRI imaging pitfalls to avoid false diagnosis. Numerous studies are currently being conducted to improve the diagnosis of PAS on imaging, including investigations looking at dynamic contrast gadolinium enhancement and machine learning.","PeriodicalId":29694,"journal":{"name":"Contemporary Diagnostic Radiology","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139125703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Is Nothing Sacrum? Identification and Treatment of Sacral Insufficiency Fractures 没有骶骨吗？骶骨损伤骨折的识别和治疗
IF 0.1
Contemporary Diagnostic Radiology Pub Date : 2023-12-31 DOI: 10.1097/01.CDR.0000996984.01005.41
Nicholaus Monsma, Rebecca Le, Robert Brooks, Evan Basha, Garrett Schneider
{"title":"Is Nothing Sacrum? Identification and Treatment of Sacral Insufficiency Fractures","authors":"Nicholaus Monsma, Rebecca Le, Robert Brooks, Evan Basha, Garrett Schneider","doi":"10.1097/01.CDR.0000996984.01005.41","DOIUrl":"https://doi.org/10.1097/01.CDR.0000996984.01005.41","url":null,"abstract":"Sacral insufficiency fractures are an overlooked etiology of back pain that can also be difficult to diagnose radiographically. Advanced imaging, including MR and scintigraphy, are useful modalities for diagnosis, as these fractures are frequently missed on plain films. Management is often conservative to avoid surgical fixation, a rarely performed surgery due to its high morbidity. Radiologists are also able to provide symptomatic relief via sacroplasty, a minimally invasive, percutaneous, image-guided procedure first described in 2002. The most common sites of pelvic insufficiency fractures include the sacral ala and parasymphyseal region of the os pubis. The butterfly or “H-shaped” pattern is a classic sign of this fracture on scintigraphy, best appreciated posteriorly. MR is considered the gold standard in diagnosing insufficiency fractures and is characterized by low T1 band-like signal intensity with corresponding high T2/T2 short-tau inversion recovery (STIR) signal intensity. Such fractures can be treated via sacroplasty by carefully injecting polymethylmethacrylate bone cement via one or more trocar needles. Knowledge of sacral anatomy is critical during the procedure to not violate specific sacral zones or traverse any of the neural foramina.","PeriodicalId":29694,"journal":{"name":"Contemporary Diagnostic Radiology","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139134079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Review of Lumbosacral MR Neurography 腰骶部磁共振神经成像回顾
IF 0.1
Contemporary Diagnostic Radiology Pub Date : 2023-11-30 DOI: 10.1097/01.CDR.0000992912.08184.35
Valerie George, Mohammed Ismail, Luke Tilmans, Amna Ajam, Xuan Nguyen
{"title":"Review of Lumbosacral MR Neurography","authors":"Valerie George, Mohammed Ismail, Luke Tilmans, Amna Ajam, Xuan Nguyen","doi":"10.1097/01.CDR.0000992912.08184.35","DOIUrl":"https://doi.org/10.1097/01.CDR.0000992912.08184.35","url":null,"abstract":"Magnetic resonance neurography (MRN) is increasingly used for the evaluation of lumbosacral plexopathy and peripheral neuropathy.1 Although clinical evaluation and electroclinical studies are helpful in evaluating function, they are limited in their ability to characterize the underlying pathology. Electromyography is very sensitive for nerve injury but lacks specificity and cannot depict the level of anatomic detail often needed to localize the nerve lesion and for treatment planning.1 Furthermore, conventional imaging studies, such as MRI or CT, have a role in evaluating extrinsic structural abnormalities that may compress the nerves, such as retroperitoneal hematomas or pelvic abscesses, but are unable to adequately depict the lumbosacral plexus and peripheral nerves due to limited imaging contrast between neural tissue and adjacent soft tissues.2 With advances in MR technology and acquisition technique, MRN has become a frequently requested advanced imaging modality for the detection of lumbosacral plexopathy and muscles and nonneural structures in the lumbar spine and pelvis.1,3","PeriodicalId":29694,"journal":{"name":"Contemporary Diagnostic Radiology","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139196810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pediatric Renal Pseudotumors: A Pictorial Review 儿童肾假肿瘤:画报综述
Contemporary Diagnostic Radiology Pub Date : 2023-11-15 DOI: 10.1097/01.cdr.0000991724.26128.8a
{"title":"Pediatric Renal Pseudotumors: A Pictorial Review","authors":"","doi":"10.1097/01.cdr.0000991724.26128.8a","DOIUrl":"https://doi.org/10.1097/01.cdr.0000991724.26128.8a","url":null,"abstract":"Contemporary Diagnostic Radiology 46(23):p 7-8, November 15, 2023. | DOI: 10.1097/01.CDR.0000991724.26128.8a","PeriodicalId":29694,"journal":{"name":"Contemporary Diagnostic Radiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136227109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pediatric Renal Pseudotumors: A Pictorial Review 儿童肾假肿瘤:画报综述
Contemporary Diagnostic Radiology Pub Date : 2023-11-15 DOI: 10.1097/01.cdr.0000991720.49719.0e
Aby Thomas
{"title":"Pediatric Renal Pseudotumors: A Pictorial Review","authors":"Aby Thomas","doi":"10.1097/01.cdr.0000991720.49719.0e","DOIUrl":"https://doi.org/10.1097/01.cdr.0000991720.49719.0e","url":null,"abstract":"Many renal lesions in the pediatric age group might mimic a renal neoplasm on imaging but may be proven on biopsy to be a wrong radiologic diagnosis. This describes the pseudotumors that a pediatric radiologist needs to remember and lesions with similar imaging characteristics.","PeriodicalId":29694,"journal":{"name":"Contemporary Diagnostic Radiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136227108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Marbles and Bubbles of the Pancreas: Imaging and Management of Pancreatic Solid and Cystic Lesions 胰腺的弹珠和泡泡:胰腺实性和囊性病变的影像学和治疗
Contemporary Diagnostic Radiology Pub Date : 2023-10-31 DOI: 10.1097/01.cdr.0000990064.84915.68
Samar Naamo, Katherine Chung, Sahil Rawal, Mutshipay Mpoy, Pablo R. Ros
{"title":"Marbles and Bubbles of the Pancreas: Imaging and Management of Pancreatic Solid and Cystic Lesions","authors":"Samar Naamo, Katherine Chung, Sahil Rawal, Mutshipay Mpoy, Pablo R. Ros","doi":"10.1097/01.cdr.0000990064.84915.68","DOIUrl":"https://doi.org/10.1097/01.cdr.0000990064.84915.68","url":null,"abstract":"The imaging features of focal pancreatic lesions have been extensively investigated in medical literature. However, given the range of pancreatic solid and cystic masses, determining the appropriate course of management can be challenging. Our purpose is to describe classic imaging findings of solid and cystic pancreatic lesions, review their clinical features, discuss the latest management recommendations, and avoid pitfalls considering lesion mimickers.","PeriodicalId":29694,"journal":{"name":"Contemporary Diagnostic Radiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135765194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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