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Papers by Mohammed Mohammed

Radiology Case Reports, 2021

Traumatic injuries to the inferior vena cava (IVC) are rare and among the most dreadful injuries ... more Traumatic injuries to the inferior vena cava (IVC) are rare and among the most dreadful injuries encountered in evaluation of both penetrating and blunt traumatic settings. Clinical outcome of IVC injury is multifactorial with injuries being classically managed surgically. In this report, we present a case of 52 years old male patient with successfully treated blunt retrohepatic IVC injury utilizing arterial stent graft and anticoagulation regime without short-term complications. Evidence based standardized approach for endovascular management of IVC injury is not yet available. We hope that our report can contribute to worldwide procedure and postprocedural anticoagulation standardization.

Bibliometric analysis can be utilized to identify the most influential literature and track the t... more Bibliometric analysis can be utilized to identify the most influential literature and track the trajectory of the research development in a given area. The purpose of this study is to summarize the top 50 most-cited landmarks and to examine the recent advances in the field of sentinel lymph node imaging. Web of Science was searched to create a database of all English language scientific journals. This search was then cross referenced with a similar search term query of Scopus to identify articles that may have been missed on the initial search. Articles were ranked by citation counts and screened by two independent reviewers. Citations for the top 50 papers ranged from 2725 to 163 with a median of 240. 10 papers were cited more than 500 times. The articles were published between 1993 - 2009 across 23 journals. Our study identifies intellectual milestones in Sentinel Lymph Node Imaging research, reflecting on the characteristics and quality of the most highly cited literature, and pr...

Canadian Association of Radiologists Journal, 2020

Emergency trauma radiology, although a relatively new subspecialty of radiology, plays a critical... more Emergency trauma radiology, although a relatively new subspecialty of radiology, plays a critical role in both the diagnosis/triage of acutely ill patients, but even more important in providing leadership and taking the lead in the preparedness of imaging departments in dealing with novel highly infectious communicable diseases and mass casualties. This has become even more apparent in dealing with COVID-19, the disease caused by the novel coronavirus SARS-CoV-2, first emerged in late 2019. We review the symptoms, epidemiology, and testing for this disease. We discuss characteristic imaging findings of COVID-19 in relation to other modern coronavirus diseases including SARS and MERS. We discuss roles that community radiology clinics, outpatient radiology departments, and emergency radiology departments can play in the diagnosis of this disease. We review practical methods to reduce spread of infections within radiology departments.

RadioGraphics, 2019

Evaluation of the nontraumatic acute abdomen with multidetector CT has long been accepted and val... more Evaluation of the nontraumatic acute abdomen with multidetector CT has long been accepted and validated as the reference standard in the acute setting. Dual-energy CT has emerged as a promising tool, with multiple clinical applications in abdominal imaging already demonstrated. With its ability to allow characterization of materials on the basis of their differential attenuation when imaged at two different energy levels, dual-energy CT can help identify the composition of internal body constituents. Therefore, it is possible to selectively identify iodine to assess the enhancement pattern of an organ, including the identification of hyperenhancement in cases of inflammatory processes, or ischemic changes secondary to vascular compromise. Quantification of iodine uptake with contrast material-enhanced dual-energy CT is also possible, and this quantification has been suggested to be useful in differentiating inflammatory from neoplastic conditions. Dual-energy CT can help determine the composition of gallstones and urolithiasis and can be used to accurately differentiate uric acid urinary calculi from non-uric acid urinary calculi. Moreover, dual-energy CT is capable of substantially reducing artifacts caused by metallic prostheses, to improve the imaging evaluation of abdominopelvic organs. The possibility of creating virtual nonenhanced images in the evaluation of acute aortic syndrome, gastrointestinal hemorrhage and is chemia, or pancreatic pathologic conditions substantially reduces the radiation dose delivered to the patient, by eliminating a true nonenhanced acquisition. Finally, by increasing the iodine conspicuity, contrast-enhanced dual-energy CT can render an area of free active extravasation or endoleak more visible, compared with conventional single-energy CT. This article reviews the basics of dual-energy CT and highlights its main clinical applications in evaluation of the nontraumatic acute abdomen. ©

Abdominal radiology (New York), Jan 30, 2018

The original version of this article unfortunately contained few mistakes. Under the subheading &... more The original version of this article unfortunately contained few mistakes. Under the subheading "Data extraction and review process", in line 12 the word "prospective" is incorrectly given by the author. The correct word is "retrospective". In Fig. 2D, the label should read as RA instead of LA. In Table 6, the word "ischemic/gangrenous" should read as "ischemia/gangrene" in 9th row, column 6. The revised Fig 2 and Table 6 is given below.

American Journal of Roentgenology, 2020

in the fields of head and neck [2, 3], chest [4, 5], abdominal and pelvic [6, 7], spinal [8], and... more in the fields of head and neck [2, 3], chest [4, 5], abdominal and pelvic [6, 7], spinal [8], and musculoskeletal imaging [9, 10], among others. DECT has potential for improving diagnosis and strengthening or expediting decision making, which is crucial in resourcelimited hospitals and imaging centers. The use of CT in acute care has grown exponentially since the inception of the modality. From 1995 to 2007, the percentage of emergency visits in the United States involving CT increased from 2.8% to 13.9% [11]. This increase in use, however, comes at an expense. Inappropriate, redundant, and follow-up imaging leads to additional costs and increased radiation exposure [12-17]. Modern DECT scanners may add useful information that has the potential to reduce unnecessary follow-up imaging or confirm the necessity of followup investigations without increasing radiation dose to the patient [18, 19]. In some cases, use

Lecture Notes in Computer Science, 2016

Accurate estimation of kidney volume is essential for clinical diagnoses and therapeutic decision... more Accurate estimation of kidney volume is essential for clinical diagnoses and therapeutic decisions related to renal diseases. Existing kidney volume estimation methods rely on an intermediate segmentation step that is subject to various limitations. In this work, we propose a segmentation-free, supervised learning approach that addresses the challenges of accurate kidney volume estimation caused by extensive variations in kidney shape, size and orientation across subjects. We develop dual regression forests to simultaneously predict the kidney area per image slice, and kidney span per image volume. We validate our method on a dataset of 45 subjects with a total of 90 kidney samples. We obtained a volume estimation accuracy higher than existing segmentationfree (by 72%) and segmentation-based methods (by 82%). Compared to a single regression model, the dual regression reduced the false positive area-estimates and improved volume estimation accuracy by 41%. We also found a mean deviation of under 10% between our estimated kidney volumes and those obtained manually by expert radiologists.