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Clinical Imaging

Rebecca Zener, Andrew Zaleski, Stan H Van Uum, Daryl K Gray, Amol Mujoomdar
Adrenocorticotropic hormone production by pancreatic neuroendocrine tumor (PNET) is rare and results in hyperstimulation of the adrenal gland to produce ectopic Cushing syndrome. Our case showcases the safety and effectiveness of percutaneous CT-guided microwave ablation of the adrenal gland in a 49-year-old female with PNET and hepatic metastases who presented with ectopic Cushing syndrome despite surgical resection of the primary pancreatic tumor and left adrenal gland. Prior to ablation, the right adrenal gland measured 4...
November 29, 2016: Clinical Imaging
Barış Yılmaz, Esin Derin Çiçek, Evrim Şirin, Güzelali Özdemir, Özgün Karakuş, Hasan Hilmi Muratlı
This study compared 20 children hospitalised with acute patellofemoral dislocation with an age-matched healthy control group with no history of knee problems or patellar dislocation. The following morphological parameters were significantly different between the groups: the mean patellar width and length, mean sulcus depth, mean patellar tendon width and total patellar volume. The magnetic resonance imaging findings of this study suggested that structurally smaller than normal patella and patellar tendon volumes are predisposing factors for acute patellofemoral dislocation...
November 17, 2016: Clinical Imaging
Yara Younan, Philip Kin-Wai Wong, Jean Jose, Ty Subhawong, Michael Baraga, Monica Umpierrez, Adam Daniel Singer
Radiologists often encounter postoperative knee radiographs lacking any adjunct clinical data which might hinder accurate image interpretation. Surgical techniques are constantly evolving with new devices being used which make it sometimes challenging for the radiologist to deduce the performed procedure and to look for associated complications. This article reviews commonly performed surgical procedures of the knee, highlights their expected postoperative radiographic appearance and describes the appearance of certain postoperative complications...
November 17, 2016: Clinical Imaging
Takumi Onoyama, Masahiko Koda, Yuki Fujise, Tomoaki Takata, Soichiro Kawata, Toshiaki Okamoto, Kennichi Miyoshi, Tomomitsu Matono, Takaaki Sugihara, Kazuya Matsumoto, Koichiro Kawaguchi, Kenichi Harada, Kazuo Yashima, Hajime Isomoto
This study aimed to compare the tissue stiffness of pancreatic ductal adenocarcinoma (PDAC) with that of pancreatic parenchyma using virtual touch quantification (VTQ). SWV was measured in 34 PDAC lesions and in pancreatic parenchyma of both controls and patients. SWVs in PDAC lesions were significantly higher than in pancreatic parenchyma in both healthy controls and in patients with PDAC. The area under the ROC for diagnosis of PDAC was 0.94 for pancreatic parenchyma in healthy controls, and 0.85 for pancreatic parenchyma in patients with PDAC...
November 17, 2016: Clinical Imaging
Susanne Wienbeck, Joachim Lotz, Uwe Fischer
The dedicated cone-beam breast computed tomography (CBBCT) is a new and promising imaging modality which provides isotropic, 3D images of the breast with high spatial and contrast resolution. Non-contrast and contrast-enhanced CBBCT (CE-CBBCT) was superior to mammography for the visualization of breast masses, especially in patients with dense breast tissue. CE-CBBCT accurately detects DCIS and distinguishes it from benign causes of microcalcifications when compared with non-contrast CBBCT and mammography. The purpose of this report is to describe the technology and its possible indications, and to present the first results from recent clinical studies, illustrating these with our own image examples...
November 17, 2016: Clinical Imaging
Sevda Yılmaz, Erhan Yumusak, Veysel Burulday
PURPOSE: To investigate whether there is any change by measuring ADC values particularly of the optic nerve head (ONH) in patients with diabetic retinopathy (DR). MATERIAL AND METHODS: ADC values at the ONHs was measured in 56 patients and 68 controls. RESULTS: ADC values of ONHs were significantly higher in patients with DR compared to controls (p=0.011). ADC values in patients with macular edema were higher than those without macular edema (p=0...
November 16, 2016: Clinical Imaging
Sebastian Obrzut, Kevin McCammack, Karam W Badran, Anthony Balistreri, Evan Ou, Brian J Nguyen, Carl K Hoh, Steven C Rose
OBJECTIVE: This study assessed the benefit of post-therapy (18)F-FDG PET/CT versus CT alone in identifying malignant liver tumor progression following radioembolization with Y-90 microspheres. METHODS: 24 patients with 44 liver tumors underwent CT imaging pre-radioembolization and PET/CT post-radioembolization. Predictive value of Response Evaluation Criteria in Solid Tumors (RECIST 1.1), The World Health Organization (WHO), mRECIST and European Association for the Study of the Liver (EASL) with PET/CT versus CT alone was assessed...
November 16, 2016: Clinical Imaging
Donna M Plecha, Courtney Garlick, Christina Dubchuck, Cheryl Thompson, Niki Constantinou
PURPOSE: To compare cancer rates after benign breast biopsies between patients with short term imaging follow-up (STFU) and those with routine follow-up (RFU). MATERIALS & METHODS: Retrospective review of benign stereotactic, US or DCE-MRI breast biopsies. RESULTS: Of 580 lesions, 192 (33%) had STFU, and 388 (67%) had RFU. For US and mammographic detected lesions, there is no difference in cancer rates between the STFU (1 cancer, n=148) and the RFU group (0 cancer, n=365) (p=0...
November 16, 2016: Clinical Imaging
Kin Man Sin, Stanton King Dat Ho, Brian Yung Kong Wong, Harry Gill, Pek-Lan Khong, Elaine Yuen Phin Lee
Extranodal lymphoma can be the primary presentation or secondary to systemic involvement of lymphoma. 2-(fluorine-18) fluoro-2-deoxy-d-glucose positron emission tomography with computer tomography (FDG-PET/CT) is useful in detecting extranodal sites during staging, treatment response assessment or recurrence detection in patients with lymphoma. In this article, we reviewed the imaging features and FDG avidity of primary extranodal lymphoma of various organs and systems on FDG-PET/CT, demonstrating the pearls and pitfalls of FDG-PET/CT in evaluating this disease entity and cross-referencing to other imaging modalities that aid in diagnosis and management...
November 16, 2016: Clinical Imaging
Ryan Mattie, Zachary L McCormick, Benjamin Fogg, Daniel M Cushman
PURPOSE: To determine the relationship between body mass index (BMI) and fluoroscopy time and radiation dose during fluoroscopy-guided glenohumeral joint injections. METHODS: This was a retrospective analysis of prospectively collected data. Physicians with board certification in Physical Medicine and Rehabilitation and/or Sports Medicine performed or supervised all injections. BMI was calculated within three months of the injection. Fluoroscopy time and radiation dose data were recorded by the fluoroscopy system and transcribed into the clinical database after each procedure...
November 16, 2016: Clinical Imaging
Madhvi Deol, Elizabeth Kagan Arleo
A 68-year-old woman with a history of multifocal uterine leiomyomas presented with left groin pain and was referred for cross-sectional imaging to assess for the presence of an inguinal hernia. In this patient, MRI demonstrated a round ligament leiomyoma encased in the proximal left inguinal canal. Leiomyomas are the most common benign gynecologic tumors, however round ligament leiomyomas are very rare. The purpose of this case report is to highlight a rare manifestation of a common entity.
November 5, 2016: Clinical Imaging
Subramaniyan Ramanathan, Yegu Palaniappan, Adnan Sheikh, John Ryan, Ania Kielar
Inguinal canal can have diverse range of pathologies due to its complex anatomy and multiple different contents in the males and females. Imaging plays a dominant role in the appropriate diagnosis and management as inguinal pathologies have fairly similar clinical presentation with pain and swelling. Various pathologies in the inguinal region include congenital, infectious/inflammatory, vascular, neoplastic and iatrogenic. This paper gives an overview of the role of various modalities like Ultrasound, CT and MRI in the evaluation of inguinal pathologies...
November 5, 2016: Clinical Imaging
Ikram Eda Duman, Canan Cimsit, Sehnaz Olgun Yildizeli, Nuri Cagatay Cimsit
PURPOSE: Determine the ability of quantitative CT (QCT) in defining parenchymal density changes in acute pulmonary embolism (PE). MATERIAL & METHODS: Mean lung density (MLD) and percentage distribution values (PDV) were calculated in 34 patients suspected of PE using software application based on computerized volumetric anatomical segmentation. RESULTS: Total, left, and right MLD differed significantly between emboli positive(n=23) and negative(n=11) groups(p<0...
November 5, 2016: Clinical Imaging
Abbas A Qayyum, Faiza Qayyum, Henrik Bw Larsson, Andreas Kjaer, Philip Hasbak, Niels G Vejlstrup, Jens Kastrup
The aim was to compare absolute quantified myocardial perfusion (MP) to semi-quantitative measurements of MP using MRI for detection of ischemia. Twenty-nine patients underwent rest and stress MP imaging obtained by 1.5T MRI and analyzed using own developed software and by commercial available software. Linear regression analysis demonstrated that absolute quantitative data correlated stronger to maxSI (rest: r=0.296, p=.193; stress: r=0.583, p=0.011; myocardial perfusion reserve (MPR): r=0.789, p<0.001; and Δ myocardial blood flow (Δ MBF: r=0...
November 5, 2016: Clinical Imaging
Hussam M Sheta, Kenneth Egstrup, Mirza Husic, Laurits J Heinsen, Koen Nieman, Jess Lambrechtsen
AIMS: To investigate the motion correction algorithm Snapshot-Freeze (SSF) compared to standard reconstruction (STD) in patients randomized to receive beta-blockers (BB) or no beta-blockers (non-BB) before coronary CT, and to investigate if SSF can replace BB. METHODS: One hundred and forty patients scheduled for coronary CT were randomized. All images were reconstructed by the SSF and STD algorithms. Image quality was evaluated according to Likert score (1: excellent, 2: good, 3: adequate, 4: non-diagnostic) and presence of artifacts was noted...
November 5, 2016: Clinical Imaging
Enrico Boninsegna, Riccardo Manfredi, Riccardo Negrelli, Giacomo Avesani, Sara Mehrabi, Roberto Pozzi Mucelli
PURPOSE: To define imaging criteria of benign and malignant nature in patients with main pancreatic duct (MPD) stenosis. MATERIALS-METHODS: S-MRCPs of 35 patients with pancreatitis and 14 with adenocarcinoma were evaluated. RESULTS: Adenocarcinoma caused higher prevalence of complete stenosis (14/14-100% vs 17/35-49%), dilated side-branches (14/14-100% vs 18/35-51%) and lower prevalence of duct-penetrating sign (0/14-0% vs 31/35-89%). The number of stenoses was higher in benign conditions (mean 1...
October 29, 2016: Clinical Imaging
Lyndon Luk, Anuradha S Shenoy-Bhangle, Guillermo Jimenez, Firas S Ahmed, Martin R Prince, Benjamin Samstein, Elizabeth M Hecht
The purpose of this study is to compare diagnostic quality, inter-observer variability and agreement of non-contrast enhanced MRA (NC-MRA) with contrast-enhanced MRA (CE-MRA) in the evaluation of hepatic arterial anatomy. 20 potential liver donors were included in this retrospective study. NC-MRA, CE-MRA and combined data sets were randomized and reviewed by two readers. Reference standard was consensus by two senior radiologists using all data including CTA. There was no difference in IQ or diagnostic confidence between NC-MRA, CE-MRA or combined data for either reader but the arterial origin of segment IV was successfully identified on NC-MRA when CE-MRA was suboptimal...
October 29, 2016: Clinical Imaging
John F Holbrook, Patricia A Hudgins, Beau B Bruce, Amit M Saindane
PURPOSE: To determine whether orbital findings on routine brain MRI can be used to differentiate patients with intracranial hypotension from controls. METHODS: The authors evaluated axial T2-weighted images for the amount of optic nerve sheath CSF and 3D-T1-weighted images for optic nerve angle of sixteen patients with intracranial hypotension and 60 controls. RESULTS: Patients with intracranial hypotension demonstrated significantly decreased CSF in the optic nerve sheath...
October 29, 2016: Clinical Imaging
Muhammed Akif Deniz, Zelal Taş Deniz, Mehmet Emin Adin, Ferit Akıl, Mehmet Turmak, Zuhat Urakcı, Mehmet Guli Cetincakmak, Cemil Goya
The aim of this study is to show the frequency of incidentally found (pulmonary thromboembolism) PTE in oncological patients and evaluate dispersion of incidents in terms of underlying primary tumor and seek risk factors associated with incidental PTE. Among one thousand oncology patients, 46 (4.6%) individuals found to have incidental PTE. Of positive patients, the highest proportion (24%) was belong to breast cancer group (n=11). The most common location for pulmonary emboli was the lower lobe branch of right pulmonary artery (n=33, 71...
October 27, 2016: Clinical Imaging
Baris Bakir, Sükrü Sanli, Vuslat Lale Bakir, Selcuk Ayas, Sevda Ozel Yildiz, Ahmet Cem Iyibozkurt, Merve Gülbiz Kartal, Ekrem Yavuz
Our purpose was to evaluate the role of diffusion-weighted imaging (DWI) in the diagnosis of various common pathologies of the uterine cavity, by comparing them with contrast-enhanced MRI findings. One hundred sixty-four patients with lesions in endometrial cavity were included in the study. The patients were grouped in four (one malignant and three benign groups). We have observed that the differences of the apparent diffusion coefficient, b1000q, and Cq values between various common benign and malignant lesions were statistically significant (P<...
October 20, 2016: Clinical Imaging
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