Lidia R. Bons¹, Lucas Uchoa de Assis¹, Silvy Dekker¹, Robert M. Kauling¹, Judith A.A.E. Cuypers¹, Hence J.M. Verhagen², Ricardo P.J. Budde³, Jolien W. Roos‐Hesselink¹

Congenital Heart Disease, Vol.13, No.6, pp. 988-996, 2018, DOI:10.1111/chd.12663

Abstract Objective: The aim is to present current clinical practice of thoracic aorta screening in a tertiary referral center. We identified how often imaging techniques were used for screening and established the value of transthoracic echocardiography (TTE) in com‐ parison with computed tomography (CT) to detect aortic dilation. We also investigated which additional abnormalities of the heart, aorta or smaller arteries were discovered.
Design: All patients ≥15 years who visited our tertiary center in 2012‐2016 for first thoracic aortic screening were retrospectively included. Diameters of the sinus of Valsalva (SoV) and maximum ascending aorta (AA) were compared between… More >

S. Gopalakrishnan^{1, *}, A. Kandaswamy²

CMES-Computer Modeling in Engineering & Sciences, Vol.114, No.2, pp. 141-152, 2018, DOI:10.3970/cmes.2018.114.141

Abstract Delineation of the lung parenchyma in the thoracic Computed Tomography (CT) is an important processing step for most of the pulmonary image analysis such as lung volume extraction, lung nodule detection and pulmonary vessel segmentation. An automatic method for accurate delineation of lung parenchyma in thoracic Computed Tomography images is presented in this paper. The proposed method involves a segmentation phase followed by a lung boundary correction technique. The tissues in the thoracic Computed Tomography can be represented by a number of Gaussians. We propose a histogram utilized Adaptive Multilevel Thresholding (AMT) for estimating the More >

Raunak D. Patel, Colton Walker, Daniel J. Canter

Canadian Journal of Urology, Vol.24, No.1, pp. 8670-8672, 2017

Abstract Diffuse large B-cell lymphomas (DLBCL) are the most common lymphomas worldwide. They also appear to be the most common primary retroperitoneal lymphomas, but this presentation is relatively uncommon in the literature. Retroperitoneal masses, including lymphomas, often present with nonspecifc symptoms and laboratory values, necessitating radiographic assessment and consideration of mass biopsy prior to the initiation of treatment. Here we present a case of a primary retroperitoneal DLBCL as well as a review of the clinical presentation, imaging fndings, and differential diagnosis of such tumors. More >

Athanasios Koutsoukis¹, Xavier Halna du Fretay², Patrick Dupouy³, Phalla Ou⁴, Jean-Pierre Laissy⁴, Jean-Michel Juliard⁵, Fabien Hyafil⁶, Pierre Aubry⁵

Congenital Heart Disease, Vol.12, No.6, pp. 726-732, 2017, DOI:10.1111/chd.12504

Abstract Objective: The diagnosis of anomalous connections of the coronary arteries (ANOCOR) requires an appropriate identification for the management of the patients involved. We studied the observer variability in the description and classification of ANOCOR between a nonexpert group of physicians and a group of expert physicians, using the ANOCOR cohort.
Patients and design: Consecutive patients identified by 71 referring cardiologists were included in the ANOCOR cohort. Anomalous connection was diagnosed by invasive and/or computed tomography coronary angiography. Angiographic images were reviewed by an angiographic committee with experience in this field. Both investigators and angiographic committee filled out… More >

Waldemar F. Carlo¹, Steven T. Clark², Santiago Borasino³, Jeffrey A. Alten³

Congenital Heart Disease, Vol.12, No.4, pp. 540-545, 2017, DOI:10.1111/chd.12482

Abstract Objective: Acute kidney injury (AKI) is a frequent complication after cardiopulmonary bypass (CBP) for cardiac surgery in neonates. It is unclear if exposure to computed tomography angiography (CTA) in the preoperative period increases the risk of AKI. We hypothesized a short interval between CTA and CPB surgery would be associated with higher rates of AKI in infants.
Design: In this single center retrospective review of patients between 2012 and 2015, neonates less than one month old were analyzed if they had CTA prior to cardiac surgery with CPB. Baseline, demographic, fluid balance, and laboratory data was analyzed.… More >

Christoph Gräni, Dominik C. Benz, Mathias Possner, Olivier F. Clerc, Fran Mikulicic, Jan Vontobel, Julia Stehli, Tobias A. Fuchs, Aju P. Pazhenkottil, Oliver Gaemperli, Philipp A. Kaufmann, Ronny R. Buechel

Congenital Heart Disease, Vol.12, No.1, pp. 49-57, 2017

Abstract Objective: To provide data on the value of fused cardiac hybrid imaging with coronary computed tomography angiography (CCTA) and positron emission tomography myocardial perfusion imaging (PET-MPI) in patients with complex coronary artery anomalies (CCAA).
Design/setting: This is a retrospective, single-center study.
Patients: Seven consecutive patients with CCAA (mean 57 ± 7 y, 86% were male) who underwent clinically indicated hybrid CCTA/PET-MPI between 2005 and 2015 in our clinic were included. The findings from both modalities and fused cardiac hybrid imaging were evaluated in these patients.
Results: Out of the seven patients with CCAA, two patients had Bland–White–Garland anomaly, two… More >

Clinton D. Bahler¹, K. Clint Cary¹, Swapnil Garg¹, Eric M. DeRoo¹, Christian H. Tabib¹, Jagan K. Kansal¹, M. Francesca Monn¹, Chandra K. Flack¹, Timothy A. Masterson¹, M. Kumar Sandrasegaran², Richard S. Foster¹, Chandru P. Sundaram¹

Canadian Journal of Urology, Vol.22, No.3, pp. 7788-7796, 2015

Abstract Introduction: To assess whether volumetric measurements can differentiate functional changes between reconstructive techniques after partial nephrectomy.
Materials and methods: One hundred and fifty-six patients undergoing partial nephrectomy for a single renal mass were retrospectively studied between 2008 and 2012. Computed tomography scans were available for volume calculations on 56 (18 non-renorrhaphy and 38 renorrhaphy). Institutional review board approval was obtained. The primary outcome was % volume loss in the operated kidney, which was calculated from three-dimensional reconstructions using a semiautomatic segmentation algorithm. Multivariable regression and propensity score analysis was performed.
Results: Volumetric analysis detected a difference… More >

Maria A. Jepperson¹, David D. Thiel², Joseph G. Cernigliaro¹, Gregory A. Broderick², William E. Haley³

Canadian Journal of Urology, Vol.21, No.1, pp. 7166-7170, 2014

Abstract Dual energy computed tomography (DECT) utilizes the material change in attenuation when imaged at two different energies to determine the composition of urinary calculi as uric acid or non-uric acid. We discuss a series of case reports illustrating DECT’s ability to provide immediate determination of uric acid versus non-uric acid calculi and facilitate more informed clinical decision-making. Further, these cases demonstrate a unique population of patients with ureteral stents and percutaneous nephrostomy tubes that benefit from DECT’s ability to create a virtual color contrast between an indwelling device and the stone material and thereby significantly More >

Y. Gür^*

Molecular & Cellular Biomechanics, Vol.11, No.4, pp. 249-258, 2014, DOI:10.3970/mcb.2014.011.249

Abstract The purpose of the study presented here was to investigate the manufacturability of human anatomical models from Computed Tomography (CT) scan data via a 3D desktop printer which uses fused deposition modelling (FDM) technology. First, Digital Imaging and Communications in Medicine (DICOM) CT scan data were converted to 3D Standard Triangle Language (STL) format by using InVaselius digital imaging program. Once this STL file is obtained, a 3D physical version of the anatomical model can be fabricated by a desktop 3D FDM printer. As a case study, a patient’s skull CT scan data was considered,… More >

Daniel S. McPartlin^1,2, Adam P. Klausner^1,2, Charles U. Nottingham¹, Jeffrey P. Wolters¹, Albert Petrossian¹, Laura R. Carucci³, B. Mayer Grob^1,2

Canadian Journal of Urology, Vol.20, No.1, pp. 6615-6619, 2013

Abstract Introduction: The purpose of this study was to evaluate the yield of cystoscopy in detecting bladder malignancy following incidentally identified bladder wall thickening observed on computed tomography (CT) scans.
Methods and materials: Data from 3000 consecutive patients who underwent diagnostic cystoscopy at a single institution from 2006-2009 were collected retrospectively. All prior CT scan reports were reviewed, and patients whose sole indication for cystoscopy was incidentally detected bladder wall thickening were identified. Patients were categorized as diffuse thickening, focal thickening, or focal bladder mass based on the radiologist's report. Collected data included patient age, gender, race, smoking… More >