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https://www.readbyqxmd.com/read/29352385/outer-wall-segmentation-of-abdominal-aortic-aneurysm-by-variable-neighborhood-search-through-intensity-and-gradient-spaces
#1
Thanongchai Siriapisith, Worapan Kusakunniran, Peter Haddawy
Aortic aneurysm segmentation remains a challenge. Manual segmentation is a time-consuming process which is not practical for routine use. To address this limitation, several automated segmentation techniques for aortic aneurysm have been developed, such as edge detection-based methods, partial differential equation methods, and graph partitioning methods. However, automatic segmentation of aortic aneurysm is difficult due to high pixel similarity to adjacent tissue and a lack of color information in the medical image, preventing previous work from being applicable to difficult cases...
January 19, 2018: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/29351939/retroperitoneal-bile-leak-after-laparoscopic-cholecystectomy
#2
Dee Zhen Lim, Enoch Wong, Sayed Hassen, Yahya Al-Habbal
Bile duct injury (BDI) is a well-recognised complication of laparoscopic cholecystectomy (LC). Following a BDI, bile usually leaks into the peritoneal space and causes biliary peritonitis. This manifests as non-specific abdominal pain and fever occurring several days after the surgery. It can be managed by laparoscopic washout with or without bile duct repair. We present a rare case of retroperitoneal bile leak post-LC. The mechanism of injury here was likely partial avulsion from excessive traction of the cystic duct during intraoperative cholangiogram...
January 18, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29350579/evaluation-of-respiratory-motion-corrected-cone-beam-ct-at-end-expiration-in-abdominal-radiotherapy-sites-a-prospective-study
#3
Russell E Kincaid, Agung E Hertanto, Yu-Chi Hu, Abraham J Wu, Karyn A Goodman, Hai D Pham, Ellen D Yorke, Qinghui Zhang, Qing Chen, Gig S Mageras
BACKGROUND: Cone beam computed tomography (CBCT) for radiotherapy image guidance suffers from respiratory motion artifacts. This limits soft tissue visualization and localization accuracy, particularly in abdominal sites. We report on a prospective study of respiratory motion-corrected (RMC)-CBCT to evaluate its efficacy in localizing abdominal organs and improving soft tissue visibility at end expiration. MATERIAL AND METHODS: In an IRB approved study, 11 patients with gastroesophageal junction (GEJ) cancer and five with pancreatic cancer underwent a respiration-correlated CT (4DCT), a respiration-gated CBCT (G-CBCT) near end expiration and a one-minute free-breathing CBCT scan on a single treatment day...
January 19, 2018: Acta Oncologica
https://www.readbyqxmd.com/read/29350048/triple-split-bolus-versus-single-bolus-ct-in-abdominal-trauma-patients-a-comparative-study
#4
Johannes Clemens Godt, Torsten Eken, Anselm Schulz, Cathrine K Johansen, Anette Aarsnes, Johann Baptist Dormagen
Background Split-bolus computed tomography (CT) is a recent development in trauma imaging. Instead of multiple scans in different contrast phases after a single contrast bolus, split-bolus protocols consist of one single scan of the thorax and abdomen after two or three contrast injections at different points of time. Purpose To evaluate and compare image quality and injury findings of a new triple-split-bolus CT (TS-CT) protocol of thorax and abdomen with those of a portal venous phase CT (PV-CT) in the same patient group...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29349403/a-novel-hybrid-left-renal-vein-transposition-and-endovascular-stenting-technique-for-the-treatment-of-posterior-nutcracker-syndrome
#5
Kristin Stawiarski, Matthew Wosnitzer, Young Erben
Posterior nutcracker syndrome occurs when a retroaortic left renal vein becomes compressed between the abdominal aorta and the lumbar spine. Although open surgical approaches remain the treatment of choice, endovascular stenting has been used successfully. We describe a case of a 28-year-old man who presented with microscopic hematuria, left-sided flank pain, and testicular swelling. Computed tomography findings were consistent with posterior nutcracker syndrome. He underwent a novel hybrid operation that included left renal vein transposition followed by endovascular stenting...
September 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29349398/unexplained-rupture-after-endovascular-aneurysm-repair
#6
Marie Josee Elizabeth van Rijn, Sander Ten Raa, Joke M Hendriks, Frederico Bastos Goncalves, Hence J M Verhagen
We present a case of a 70-year-old man who was admitted with rupture of an abdominal aneurysm 4 years after endovascular aneurysm repair. He was compliant with yearly follow-up computed tomography angiography. One month earlier, his computed tomography angiogram showed perfect exclusion of the aneurysm and no endoleak. We explanted the stent graft and confirmed effective sealing, and the graft was intact. We found no signs of infection during 2 years of follow-up. This rupture is nonpredictable and unexplained and illustrates that unremarkable imaging does not guarantee prevention of rupture...
September 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29349369/potentially-stress-induced-acute-splanchnic-segmental-arterial%C3%A2-mediolysis-with-a-favorable-spontaneous-outcome
#7
Aude Belbezier, Françoise Sarrot-Reynauld, Frédéric Thony, Florence Tahon, Olivier Heck, Laurence Bouillet
A 62-year-old woman presented with hemithoracic anesthesia and acute abdominal pain following a violent psychological stress. Magnetic resonance imaging showed a thoracic hematoma with arachnoiditis of the spinal cord. Tomography revealed a typical aspect of segmental arterial mediolysis with multiple aneurysms and stenoses of the splanchnic arteries, confirmed by abdominal arteriography. There was no argument for hereditary, traumatic, atherosclerotic, infectious, or inflammatory arterial disease. Segmental arterial mediolysis was diagnosed on the basis of the radiologic data and probably involved both medullary and splanchnic arteries...
March 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29349366/an-18-cm-unruptured-abdominal-aortic-aneurysm
#8
Nathan M Droz, Jason Miner, Louisa Pecchioni
Abdominal aortic aneurysm (AAA) is a significant source of morbidity and ranked by the Centers for Disease Control and Prevention as the 15th leading cause of death among adults aged 60 to 64 years. Size confers the largest risk factor for aneurysm rupture, with aneurysms >6 cm having an annual rupture risk of 14.1%. We present the case of a 60-year-old man found on ultrasound imaging at a health fair screening to have a 15-cm AAA. Follow-up computed tomography angiography revealed an 18-cm × 10-cm unruptured, infrarenal, fusiform AAA...
March 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29348025/pet-mr-imaging-of-malondialdehyde-acetaldehyde-epitopes-with-a-human%C3%A2-antibody-detects-clinically%C3%A2-relevant-atherothrombosis
#9
Max L Senders, Xuchu Que, Young Seok Cho, Calvin Yeang, Hannah Groenen, Francois Fay, Claudia Calcagno, Anu E Meerwaldt, Simone Green, Phuong Miu, Mark E Lobatto, Thomas Reiner, Zahi A Fayad, Joseph L Witztum, Willem J M Mulder, Carlos Pérez-Medina, Sotirios Tsimikas
BACKGROUND: Oxidation-specific epitopes (OSEs) are proinflammatory, and elevated levels in plasma predict cardiovascular events. OBJECTIVES: The purpose of this study was to develop novel positron emission tomography (PET) probes to noninvasively image OSE-rich lesions. METHODS: An antigen-binding fragment (Fab) antibody library was constructed from human fetal cord blood. After multiple rounds of screening against malondialdehyde-acetaldehyde (MAA) epitopes, the Fab LA25 containing minimal nontemplated insertions in the CDR3 region was identified and characterized...
January 23, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29345401/are-characteristics-of-abdominal-pain-helpful-to-identify-patients-with-visceral-hypersensitivity-in-irritable-bowel-syndrome-results-of-a-prospective-study
#10
C Melchior, L Bril, A-M Leroi, G Gourcerol, P Ducrotté
BACKGROUND: Some consider that patients with visceral hypersensitivity may represent a separate entity within the IBS population not only from a pathophysiological but also from a clinical perspective. The aim of this prospective exploratory study was to assess whether characteristics of abdominal pain in IBS patients could be suggestive of hypersensitivity. METHODS: This prospective study included consecutive IBS patients selected by Rome III criteria. Validated scores (IBS-SSS, Bristol stool scale, HADS) were used to phenotype patients who were also asked to describe the main location of their abdominal pain on a simple image (abdomen divided into 6 zones)...
January 18, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29344522/intraductal-papillary-mucinous-neoplasms-of-the-pancreas-strategic-considerations
#11
Vicente Morales-Oyarvide, Zhi Ven Fong, Carlos Fernández-Del Castillo, Andrew L Warshaw
Intraductal papillary mucinous neoplasms (IPMN) are cystic neoplasms with the potential for progression to pancreatic cancer. Recognized by the global medical community just over two decades ago, IPMN have gained great epidemiological and clinical relevance thanks to the widespread use of cross-sectional abdominal imaging, which has led to a surge in the number of incidental pancreatic cysts being diagnosed. As our understanding of this disease has improved, we now know that some IPMN have a very elevated risk of cancer and require surgical resection, while others are low-risk lesions and can be followed...
December 2017: Visceral Medicine
https://www.readbyqxmd.com/read/29343816/sclerotic-bone-lesions-as-a-potential-imaging-biomarker-for-the-diagnosis-of-tuberous-sclerosis-complex
#12
Susanne Brakemeier, Lars Vogt, Lisa C Adams, Bianca Zukunft, Gerd Diederichs, Bernd Hamm, Klemens Budde, Kai-Uwe Eckardt, Marcus R Makowski
Tuberous-sclerosis-complex (TSC) is associated with a high lifetime risk of severe complications. Clinical manifestations are largely variable and diagnosis is often missed. Sclerotic-bone-lesions (SBL) could represent a potential imaging biomarker for the diagnosis of TSC. In this study, computed tomography (CT) data sets of 49 TSC patients (31 females) were included and compared to an age/sex matched control group. Imaging features of SBLs included frequency, size and location pattern. Sensitivities, specificities and cutoff values for the diagnosis of TSC were established for the skull, thorax, and abdomen/pelvis...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29341013/rodent-abdominal-adipose-tissue-imaging-by-mr
#13
Bhanu Prakash Kn, Jadegoud Yaligar, Sanjay K Verma, Venkatesh Gopalan, S Sendhil Velan
Rodents including rats and mice are important models to study obesity, diabetes, and metabolic syndrome in a preclinical setting. Translational and longitudinal imaging of these rodents permit investigation of metabolic diseases and identification of imaging biomarkers suitable for clinical translation. Here we describe the imaging protocols for achieving quantitative abdominal imaging in small animals followed by segmentation and quantification of fat volumes.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29340993/laparoscopic-assisted-modified-intersphincter-resection-for-ultralow-rectal-cancer
#14
Haiyang Zhou, Canping Ruan, Zhiguo Wang, Zhiqian Hu
BACKGROUND: Intersphincter resection (ISR) is considered to be a superior technique offering sphincter preservation in patients with ultralow rectal cancer.1 Because high-definition laparoscopy offers wider and clearer vision into the narrow pelvic cavity and intersphincteric space, ISR has been further refined.2 However, functional outcome after ISR has not been optimal. More than half of patients receiving ISR suffer partial or even complete anal incontinence.3 We therefore propose a laparoscopic-assisted modified ISR, with the aim of improving sphincter function following ISR...
January 16, 2018: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29340267/postherpetic-abdominal-pseudohernia-a-diagnostic-pitfall
#15
Yu Yagi, Takashi Matono, Kenichi Nakamura, Hiroshi Imura
The accurate diagnosis of postherpetic abdominal pseudohernia, the rare complication of herpes zoster, is essential to avoid unnecessary imaging studies or surgery. Close observation and waiting for complete recovery are warranted considering the disease's self-resolving nature and favorable prognosis.
January 2018: Journal of General and Family Medicine
https://www.readbyqxmd.com/read/29338526/associations-of-abdominal-subcutaneous-and-visceral-fat-with-insulin-resistance-and-secretion-differ-between-men-and-women-the-netherlands-epidemiology-of-obesity-study
#16
Renée de Mutsert, Karin Gast, Ralph Widya, Eelco de Koning, Ingrid Jazet, Hildo Lamb, Saskia le Cessie, Albert de Roos, Jan Smit, Frits Rosendaal, Martin den Heijer
BACKGROUND: Abdominal obesity is a well-established risk factor for the development of type 2 diabetes. However, sex differences may exist. We aimed to investigate the associations of abdominal subcutaneous adipose tissue (SAT) and visceral adipose tissue (VAT) with insulin resistance and insulin secretion in men and women. METHODS: In this cross-sectional analysis of the Netherlands Epidemiology of Obesity study, fasting and postprandial concentrations of glucose and insulin were measured and abdominal fat depots were assessed using magnetic resonance imaging in 2253 participants (53% women)...
January 17, 2018: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/29335777/fully-automatic-ct-histogram-based-fat-estimation-in-dead-bodies
#17
Michael Hubig, Sebastian Schenkl, Holger Muggenthaler, Felix Güttler, Andreas Heinrich, Ulf Teichgräber, Gita Mall
Post-mortem body cooling is the foundation of temperature-based death time estimations (TDE) in homicide cases. Forensic science generally provides two types of p.m. body cooling models, the phenomenological and the physical models. Since both of them have to implement important individual parameters like the quantity of abdominal fat explicitly or implicitly, a more exact quantification and localization of abdominal fat is a desideratum in TDE. Particularly for the physical models, a better knowledge of the abdominal fat distribution could lead to relevant improvements in TDEs...
January 15, 2018: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29333468/extraosseous-accumulation-of-technetium-99m-methyl-diphosphonate-99mtc-mdp-in-a-child-with-all-a-case-report
#18
Farnaz Banezhad, Narjess Ayati, Farrokh Seilanian Toosi, Samine Boloursaz, S Rasoul Zakavi
Extraosseous accumulation of technetium-99m-methyl diphosphonate (99mTc-MDP) on bone scan is not common. This phenomenon is often attributed to abnormality of calcium metabolism and has been reported in a variety of conditions including metabolic diseases and malignancies. A five years old boy is presented here, who was admitted to the pediatric emergency suffering from fatigue, respiratory symptoms, weight loss, intermittent fevers, anorexia, nausea and vomiting, edema of legs and abdominal distension for one month...
2018: Asia Oceania Journal of Nuclear Medicine & Biology
https://www.readbyqxmd.com/read/29332735/within-day-and-between-day-reliability-of-thickness-measurements-of-abdominal-muscles-using-ultrasound-during-abdominal-hollowing-and-bracing-maneuvers
#19
Mahnaz Aboufazeli, Nima Afshar-Mohajer
Ultrasonography imaging has been used as a non-invasive method to estimate the thickness and relative activities of the abdominal muscles in patients with lower back pain (LBP). However, the statistical reliability of US thickness measurements of abdominal muscles, including transversus abdominis (TrA), internal oblique (IO) and external oblique (EO) muscles during abdominal hollowing (AH) and abdominal bracing (AB) maneuvers has not been well-investigated. This study was performed on a total of 20 female subjects (10 with LBP and 10 without LBP) in the age range of 25-55 years to assess within-day and between-day reliability of the measurements...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29331884/true-left-sided-gallbladder-a-case-report-and-comparison-with-the-literature-for-the-different-techniques-of-laparoscopic-cholecystectomy-for-such-anomalies
#20
Tamer Saafan, James Yi Hu, Ahmed-Emad Mahfouz, Abdelrahman Abdelaal
INTRODUCTION: True left-sided gallbladder (LSG) is a rare finding that may present with symptoms similar to those of a normally positioned gallbladder. Moreover, it may be missed by preoperative imaging studies such as ultrasound, computed tomography (CT), magnetic resonance imaging (MRI), or endoscopic ultrasound. True left-sided gallbladder is a surgical challenge and surgical technique may need to be modified for the completion of laparoscopic cholecystectomy. PRESENTATION OF CASE: In this case report, we present a case of true left-sided gallbladder that produced right-sided abdominal symptoms...
December 27, 2017: International Journal of Surgery Case Reports
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