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Volumetry

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https://read.qxmd.com/read/30767773/computed-tomography-volumetry-of-esophageal-cancer-the-role-of-semiautomatic-assessment
#1
Yi-Hua Zhang, Michael A Fischer, Henrik Lehmann, Åse Johnsson, Ioannis Rouvelas, Gunnar Herlin, Lars Lundell, Torkel B Brismar
BACKGROUND: The clinical and research value of Computed Tomography (CT) volumetry of esophageal cancer tumor size remains controversial. Development in CT technique and image analysis has made CT volumetry less cumbersome and it has gained renewed attention. The aim of this study was to assess esophageal tumor volume by semi-automatic measurements as compared to manual. METHODS: A total of 23 esophageal cancer patients (median age 65, range 51-71), undergoing CT in the portal-venous phase for tumor staging, were retrospectively included between 2007 and 2012...
February 15, 2019: BMC Medical Imaging
https://read.qxmd.com/read/30742625/correlation-between-the-native-lung-volume-change-and-postoperative-pulmonary-function-after-single-lung-transplantation-for-lymphangioleiomyomatosis-evaluation-of-lung-volume-by-three-dimensional-computed-tomography-volumetry
#2
Hirotoshi Suzuki, Hisashi Oishi, Masafumi Noda, Tatsuaki Watanabe, Yasushi Matsuda, Junya Tominaga, Tetsu Sado, Akira Sakurada, Hajime Kurosawa, Kei Takase, Yoshinori Okada
PURPOSE: Whereas native lung overinflation has been thought to happen in recipients of single lung transplantation for lymphangioleiomyomatosis because of its increased compliance, there is no study that has reported the details on the change of the native lung volume after single lung transplantation by three-dimensional computed tomography volumetry. The purpose of the present study was to evaluate the lung volume after single lung transplantation for lymphangioleiomyomatosis by three-dimensional computed tomography volumetry and investigate the correlation between the native lung volume change and postoperative pulmonary function...
2019: PloS One
https://read.qxmd.com/read/30734180/comprehensive-characterization-of-a-porcine-model-of-the-small-for-flow-syndrome
#3
Maitane I Orue-Echebarria, Javier Vaquero, Cristina J Lisbona, Pablo Lozano, Miguel A Steiner, Álvaro Morales, José Á López-Baena, Juan Laso, Inmaculada Hernández, Luis Olmedilla, José L García Sabrido, Isabel Peligros, Emma Sola, Carlos Carballal, Elena Vara, J M Asencio
INTRODUCTION: The term "Small-for-Flow" reflects the pathogenetic relevance of hepatic hemodynamics for the "Small-For-Size" syndrome and posthepatectomy liver failure. We aimed to characterize a large-animal model for studying the "Small-for-Flow" syndrome. METHODS: We performed subtotal (90%) hepatectomies in 10 female MiniPigs using a simplified transection technique with a tourniquet. Blood tests, hepatic and systemic hemodynamics, and hepatic function and histology were assessed before (Bas), 15 min (t-15 min) and 24 h (t-24 h) after the operation...
February 7, 2019: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://read.qxmd.com/read/30722026/reliability-and-validity-of-measurement-tools-for-residual-limb-volume-in-people-with-limb-amputations-a-systematic-review
#4
Lucy Armitage, Lauren Kark, Sharon Czerniec, Li Khim Kwah
Background: Measurements of residual limb volume often guide decisions on the type and timing of prosthetic prescription. To help inform these decisions, it is important that clinicians use measurement tools that are reliable and valid. Purpose: The aim of this systematic review was to investigate the reliability and validity of measurement tools for residual limb volume in people with limb amputations. Data Sources: A comprehensive search on MEDLINE, Embase, CINAHL, SCOPUS, and Web of Science was performed on July 11, 2016...
February 4, 2019: Physical Therapy
https://read.qxmd.com/read/30711244/expanded-makuuchi-s-criteria-using-estimated-indocyanine-green-clearance-rate-of-future-liver-remnant-as-a-safety-limit-for-maximum-extent-of-liver-resection
#5
Yuta Kobayashi, Yoshitaka Kiya, Toshitaka Sugawara, Yujiro Nishioka, Masaji Hashimoto, Junichi Shindoh
BACKGROUND: Recent advances in liver surgery have dramatically improved the safety of hepatectomy for hepatocellular carcinoma (HCC). The aim of this study was to compare outcomes for patients fulfilling an extended criteria vs. those fulfilling the conventional criteria based on the bilirubin and indocyanine green (ICG) clearance (Makuuchi's criteria). METHODS: The short term outcomes of patients undergoing hepatectomy for HCC and who fulfilled the expanded criteria (ICG clearance of future remnant liver [ICG-Krem] ≥ 0...
January 30, 2019: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
https://read.qxmd.com/read/30710874/structural-covariance-in-subcortical-stroke-patients-measured-by-automated-mri-based-volumetry
#6
Caihong Wang, Lei Zhao, Yishan Luo, Jingchun Liu, Peifang Miao, Sen Wei, Lin Shi, Jingliang Cheng
A network-level investigation of the volumetric changes of subcortical stroke patients is still lacking. Here, we explored the alterations of structural covariance caused by subcortical stroke with automated brain volumetry. T1-weighed brain MRI scans were obtained from 63 normal controls (NC), 46 stroke patients with infarct in left internal capsule (CI_L), 33 stroke patients with infarct in right internal capsule (CI_R). We performed automatic anatomical segmentation of the T1-weighted brain images with AccuBrain...
January 22, 2019: NeuroImage: Clinical
https://read.qxmd.com/read/30691672/radiation-dose-reduction-techniques-for-chest-ct-principles-and-clinical-results
#7
REVIEW
Yoshiharu Ohno, Hisanobu Koyama, Shinichiro Seki, Yuji Kishida, Takeshi Yoshikawa
Computer tomography plays a major role in the evaluation of thoracic diseases, especially since the advent of the multidetector-row CT (MDCT) technology. However, the increase use of this technique has raised some concerns about the resulting radiation dose. In this review, we will present the various methods allowing limiting the radiation dose exposure resulting from chest CT acquisitions, including the options of image filtering and iterative reconstruction (IR) algorithms. The clinical applications of reduced dose protocols will be reviewed, especially for lung nodule detection and diagnosis of pulmonary thromboembolism...
February 2019: European Journal of Radiology
https://read.qxmd.com/read/30689581/novel-blood-biomarkers-that-correlate-with-cognitive-performance-and-hippocampal-volumetry-potential-for-early-diagnosis-of-alzheimer-s-disease
#8
Fred Hudd, Anna Shiel, Matthew Harris, Paul Bowdler, Bryony Wood, Demi Tsivos, Alfie Wearn, Michael Knight, Risto Kauppinen, Elizabeth Coulthard, Paul White, Myra Elizabeth Conway
BACKGROUND: Differential diagnosis of people presenting with mild cognitive impairment (MCI) that will progress to Alzheimer's disease (AD) remains clinically challenging. Current criteria used to define AD include a series of neuropsychological assessments together with relevant imaging analysis such as magnetic resonance imaging (MRI). The clinical sensitivity and specificity of these assessments would be improved by the concomitant use of novel serum biomarkers. The branched chain aminotransferase proteins (BCAT) are potential candidates as they are significantly elevated in AD brain, correlate with Braak Stage, and may have a role in AD pathology...
January 21, 2019: Journal of Alzheimer's Disease: JAD
https://read.qxmd.com/read/30682531/emerging-differences-between-huntington-s-disease-like-2-and-huntington-s-disease-a-comparison-using-mri-brain-volumetry
#9
David G Anderson, Mark Haagensen, Aline Ferreira-Correia, Ronald Pierson, Jonathan Carr, Amanda Krause, Russell L Margolis
Huntington's Disease-Like 2 (HDL2), caused by a CTG/CAG expansion in JPH3 on chromosome 16q24, is the most common Huntington's Disease (HD) phenocopy in populations with African ancestry. Qualitatively, brain MRIs of HDL2 patients have been indistinguishable from HD. To determine brain regions most affected in HDL2 a cross-sectional study using MRI brain volumetry was undertaken to compare the brains of nine HDL2, 11 HD and nine age matched control participants. Participants were ascertained from the region in South Africa with the world's highest HDL2 incidence...
January 7, 2019: NeuroImage: Clinical
https://read.qxmd.com/read/30663329/internet-addiction-associated-with-right-pars-opercularis-in-females
#10
Orsolya Inhóf, András N Zsidó, Gábor Perlaki, Gergely Orsi, Beatrix Lábadi, Norbert Kovács, Anna Szente, Tamás Dóczi, József Janszky, Gergely Darnai
BACKGROUND AND AIMS: Structural differences in higher-order brain areas are common features of behavioral addictions, including Internet addiction (IA) as well. Taking into consideration the limited number of studies and methods used in previous studies on IA, our aim was to investigate the correlates of IA and the morphometry of the frontal lobes. METHODS: To observe these relationships, the high-resolution T1-weighted MR images of 144 healthy, Caucasian, university students were analyzed with volumetry and voxel-based morphometry...
January 20, 2019: Journal of Behavioral Addictions
https://read.qxmd.com/read/30655158/hepatobiliary-scintigraphy-in-the-preoperative-evaluation-of-potential-living-liver-donors
#11
M Serenari, C Pettinato, C Bonatti, L Zanoni, F Odaldi, A Cucchetti, M Ravaioli, S Fanti, A D Pinna, M Cescon
BACKGROUND: Graft selection strategy in living donor liver transplantation (LDLT) is usually multifactorial, but special attention is paid to the determination of donor liver volumes to minimize any risk of posthepatectomy liver failure (PHLF). Hepatobiliary scintigraphy (HBS) with single-photon-emission computed tomography allows for the measurement of total and future liver remnant function (FLR-F) and has been shown to predict the risk of PHLF more accurately than liver volumetry. METHODS: Since November 2016, HBS has been performed at our Institution in every candidate to major hepatectomy, including potential living liver donors...
June 30, 2018: Transplantation Proceedings
https://read.qxmd.com/read/30653398/evaluation-of-a-novel-water-based-volumetric-device-for-measuring-upper-limb-lymphedema-first-experience-with-healthy-volunteers
#12
Joost A G N Wolfs, Ennie Bijkerk, Rutger M Schols, Xavier H A Keuter, René R W J van der Hulst, Shan S Qiu
BACKGROUND: Lymphedema is a chronic, progressive disease consisting of tissue swelling resulting from excessive retention of lymphatic fluid. Measuring upper limb volume is crucial in patients to detect disease progression and to study the effects of treatment. The aim is to assess the validity and reliability of a newly developed system, Peracutus Aqua Meth, for measuring the upper limb volume compared with the gold standard water volumetry device. (In this study, the Bravometer was used)...
January 17, 2019: Lymphatic Research and Biology
https://read.qxmd.com/read/30651095/model-based-virtual-patient-analysis-of-human-liver-regeneration-predicts-critical-perioperative-factors-controlling-the-dynamic-mode-of-response-to-resection
#13
Babita K Verma, Pushpavanam Subramaniam, Rajanikanth Vadigepalli
BACKGROUND: Liver has the unique ability to regenerate following injury, with a wide range of variability of the regenerative response across individuals. Existing computational models of the liver regeneration are largely tuned based on rodent data and hence it is not clear how well these models capture the dynamics of human liver regeneration. Recent availability of human liver volumetry time series data has enabled new opportunities to tune the computational models for human-relevant time scales, and to predict factors that can significantly alter the dynamics of liver regeneration following a resection...
January 16, 2019: BMC Systems Biology
https://read.qxmd.com/read/30627026/semiautomatic-three-dimensional-threshold-based-cardiac-computed-tomography-ventricular-volumetry-in-repaired-tetralogy-of-fallot-comparison-with-cardiac-magnetic-resonance-imaging
#14
Hyun Woo Goo
Objective: To assess the accuracy and potential bias of computed tomography (CT) ventricular volumetry using semiautomatic three-dimensional (3D) threshold-based segmentation in repaired tetralogy of Fallot, and to compare them to those of two-dimensional (2D) magnetic resonance imaging (MRI). Materials and Methods: This retrospective study evaluated 32 patients with repaired tetralogy of Fallot who had undergone both cardiac CT and MRI within 3 years. For ventricular volumetry, semiautomatic 3D threshold-based segmentation was used in CT, while a manual simplified contouring 2D method was used in MRI...
January 2019: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://read.qxmd.com/read/30625332/hippocampal-dentate-gyrus-atrophy-predicts-pattern-separation-impairment-in-patients-with-lgi1-encephalitis
#15
Annika Hanert, Julius Rave, Oliver Granert, Martin Ziegler, Anya Pedersen, Jan Born, Carsten Finke, Thorsten Bartsch
Day-to-day life involves the perception of events that resemble one another. For the sufficient encoding and correct retrieval of similar information, the hippocampus provides two essential cognitive processes. Pattern separation refers to the differentiation of similar input information, whereas pattern completion reactivates memory representations based on noisy or degraded stimuli. It has been shown that pattern separation specifically relies on the hippocampal dentate gyrus (DG), whereas pattern completion is performed within CA3 networks...
January 6, 2019: Neuroscience
https://read.qxmd.com/read/30620977/-quantitative-volumetric-analysis-of-the-lower-extremity-validation-against-established-tape-measurement-and-water-displacement
#16
Konstantin Christoph Koban, Virginia Titze, Lucas Etzel, Konstantin Frank, Thilo Schenck, Riccardo Giunta
BACKGROUND: Tape measures continue to be used for the diagnosis and evaluation of lipoedema and lymphoedema in the clinical routine. Extremity volumes are calculated based on standardised circumferential measurements. Other volume measurements such as water displacement are not applied on a regular basis. This study aimed to evaluate a 3D scanner as an alternative and reproducible tool to objectively measure the volumes of the lower extremity. PATIENTS, MATERIALS AND METHOD: We used a commercially available 3D scanner, the Artec Eva® , to perform 3D scans of the lower extremities on 20 subjects and calculated the volume using the appropriate software...
December 2018: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://read.qxmd.com/read/30618424/single-incision-laparoscopic-surgery-portal-vein-embolisation-before-extended-hepatectomy
#17
Julius Maximilian Plewe, Simon Wabitsch, Felix Krenzien, Philipp Haber, Timm Denecke, Bernhard Gebauer, Robert Öllinger, Johann Pratschke, Moritz Schmelzle
Objective: Portal vein embolisation (PVE) represents the standard procedure for augmentation of the contralateral lobe before extended right hepatectomy. However, possible limitations for the percutaneous transhepatic approach exist, for example, large tumours of the right lobe. Here, we present our experiences with single-incision laparoscopic surgery-PVE (SILS-PVE) as an alternative approach for settings where percutaneous routes are technically not feasible. Methods: A small umbilical incision is performed, and a GelPOINT Mini Advanced Access Platform (Santa Margarida, CA, USA) is placed...
January 4, 2019: Journal of Minimal Access Surgery
https://read.qxmd.com/read/30612441/pure-bipolar-plasma-vaporization-of-the-prostate-results-from-a-prospective-3d-ultrasound-volumetry-study-with-clinical-outcome-after-3-years
#18
Thomas Hermanns, Oliver Gross, Christian Daniel Fankhauser, Marian Severin Wettstein, Nico Christian Grossmann, Etienne Xavier Keller, Daniel Eberli, Marko Kozomara, Tullio Sulser, Cédric Poyet, Benedikt Kranzbühler
INTRODUCTION AND OBJECTIVES: Bipolar plasma vaporization (BPV) has been shown to be a low-morbidity alternative to conventional transurethral resection of the prostate (TURP). Improved functional short-term outcome and postoperative prostate volume reduction comparable to TURP have been reported. However, comprehensive mid- or long-term results following BPV are still lacking. METHODS: A consecutive series of men who underwent pure BPV in a tertiary care academic center was prospectively investigated...
January 5, 2019: Journal of Endourology
https://read.qxmd.com/read/30596614/laparoscopic-partial-alpps-much-better-than-alpps
#19
Stéphanie Truant, Mehdi El Amrani, Clio Baillet, Anne Ploquin, Katia Lecolle, Olivier Ernst, Mohamed Hebbar, Damien Huglo, François-René Pruvot
Associating Liver Partition and Portal Vein Ligation for Staged Hepatectomy (ALPPS) has emerged as an alternative for patients with bilobar colorectal liver metastasis deemed unresectable due to inadequate future remnant liver (FRL). Nevertheless, high morbidity and mortality rates have been reported. In this setting, including hepatobiliary scintigraphy in the clinical and surgical management of patients offered ALPPS has been advocated to both assess eligibility for ALPPS stage1 and suitable time for ALPPS stage2...
December 13, 2018: Annals of Hepatology
https://read.qxmd.com/read/30591507/effect-of-gadolinium-on-the-estimation-of-myelin-and-brain-tissue-volumes-based-on-quantitative-synthetic-mri
#20
T Maekawa, A Hagiwara, M Hori, C Andica, T Haruyama, M Kuramochi, M Nakazawa, S Koshino, R Irie, K Kamagata, A Wada, O Abe, S Aoki
BACKGROUND AND PURPOSE: The effect of gadolinium on the estimation of myelin has not been reported. The aim of the current study was to investigate the effects of gadolinium on automatic myelin and brain tissue volumetry via quantitative synthetic MR imaging. MATERIALS AND METHODS: The study included 36 patients who were referred for brain metastases screening, and quantitative synthetic MR imaging data before and after gadolinium-based contrast agent administration were analyzed retrospectively...
December 27, 2018: AJNR. American Journal of Neuroradiology
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