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Volumetry

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https://www.readbyqxmd.com/read/30094637/assessment-of-the-correlation-between-preoperative-and-immediate-postoperative-gastric-volume-and-weight-loss-after-sleeve-gastrectomy-using-computed-tomography-volumetry
#1
Hosam Elbanna, Sameh Emile, Galal El-Sayed El-Hawary, Noha Abdelsalam, Hossam Abdelhafiz Zaytoun, Haitham Elkaffas, Ahmed Ghanem
BACKGROUND: Laparoscopic sleeve gastrectomy (LSG) has achieved excellent results in treatment of morbid obesity. The present study aimed to evaluate the impact of the preoperative gastric volume, volume of the remaining gastric pouch, and volume of the resected stomach on weight loss after LSG. METHODS: Patients with morbid obesity who underwent LSG were investigated by CT volumetry before and 1 week after LSG to measure the volume of the stomach before and after the procedure, and the volume of the resected stomach was also calculated...
August 9, 2018: World Journal of Surgery
https://www.readbyqxmd.com/read/30087902/statistical-structural-analysis-of-familial-spontaneous-epileptic-cats-using-voxel-based-morphometry
#2
Yuji Hamamoto, Daisuke Hasegawa, Yoshihiko Yu, Rikako Asada, Shunta Mizoguchi, Takayuki Kuwabara, Masae Wada, Aki Fujiwara-Igarashi, Michio Fujita
Voxel-based morphometry (VBM) based on high resolution three-dimensional data of magnetic resonance imaging has been developed as a statistical morphometric imaging analysis method to locate brain abnormalities in humans. Recently, VBM has been used for human patients with psychological or neurological disorders such as Alzheimer's disease, Parkinson's disease, and epilepsy. Traditional volumetry using region of interest (ROI) is performed manually and the observer needs detailed knowledge of the neuroanatomy having to trace objects of interest on many slices which can cause artificial errors...
2018: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/30079139/hepatectomy-for-gallbladder-cancer-with-unclassified-anomaly-of-right-sided-ligamentum-teres-a-case-report-and-review-of-the-literature
#3
Toru Goto, Hiroaki Terajima, Takehito Yamamoto, Yoichiro Uchida
Right-sided ligamentum teres (RSLT) is a congenital anomaly in which the right umbilical ligament becomes dominant and anomalous ramifications of the hepatic vessels and biliary system are present. A male patient in his 70s was diagnosed with advanced gallbladder cancer directly infiltrating the right hepatic duct (RHD), together with RSLT. Preoperative three-dimensional simulation of the liver based on multiple detector computed tomography images after cholangiography revealed ramifications of all segmental portal veins from the portal trunk and discordance of the arterial and biliary branching patterns of segment 8...
July 27, 2018: World Journal of Hepatology
https://www.readbyqxmd.com/read/30076451/-big-data-and-artificial-intelligence-for-diagnostic-decision-support-in-atypical-dementia
#4
REVIEW
K Egger, M Rijntjes
The differential diagnosis of atypical dementia remains difficult. The use of positron emission tomography (PET) still represents the gold standard for imaging diagnostics. According to the current evidence, however, magnetic resonance imaging (MRI) is almost equal to fluorodeoxyglucose (FDG)-PET, but only when using new big data and machine learning methods. In cases of atypical dementia, especially in younger patients and for follow-up, MRI is preferable to computed tomography (CT). In the clinical routine, promising MRI procedures are e...
August 3, 2018: Der Nervenarzt
https://www.readbyqxmd.com/read/30075551/associating-liver-partition-and-portal-vein-ligation-for-staged-hepatectomy-procedure-using-ischemic-bipartition-two-case-reports
#5
Marcel C C Machado, Emerson S Abe, Rodrigo Dumarco, Públio Viana, Marcel Autran C Machado
RATIONALE: The associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) procedure is a recently introduced treatment strategy for patients with advanced primary or metastatic liver tumors and small future liver remnants. ALPPS procedure using ischemic bipartition of the liver is a modified technique that may reduce complications compared to classical ALPPS. PATIENT CONCERNS: Two patients with multiple colorectal liver metastasis with extensive involvement of the liver were considered unresectable before treatment because of small future liver remnant (FLR)...
August 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/30073402/ultra-low-dose-limited-renal-ct-for-volumetric-stone-surveillance-advantages-over-standard-unenhanced-ct
#6
Virginia B Planz, Natasza M Posielski, Meghan G Lubner, Ke Li, Guang-Hong Chen, Stephen Y Nakada, Perry J Pickhardt
PURPOSE: To describe and validate a novel CT approach using volumetric analysis for renal stone surveillance. MATERIALS AND METHODS: This prospective trial consisted of a standard low-dose non-contrast CT (SLD) of the abdomen and pelvis, immediately followed by an ultra-low-dose non-contrast CT (ULD) with reconstruction limited to the kidneys. A novel dedicated software tool was applied that automates stone volume, density, and maximum linear size. Manual linear stone size was measured by a radiology fellow and urology resident for comparison...
August 2, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/30067820/computed-tomography-trachea-volumetry-in-patients-with-scleroderma-association-with-clinical-and-functional-findings
#7
Bruno Rangel Antunes Silva, Rosana Souza Rodrigues, Rogério Rufino, Cláudia Henrique Costa, Veronica Silva Vilela, Roger Abramino Levy, Alan Ranieri Medeiros Guimarães, Alysson Roncally Silva Carvalho, Agnaldo José Lopes
BACKGROUND: In scleroderma, excessive collagen production can alter tracheal geometry, and computed tomography (CT) volumetry of this structure may aid in detecting possible abnormalities. The objectives of this study were to quantify the morphological abnormalities in the tracheas of ​​patients with scleroderma and to correlate these findings with data on clinical and pulmonary function. METHODS: This was a cross-sectional study in which 28 adults with scleroderma and 27 controls matched by age, gender and body mass index underwent chest CT with posterior segmentation and skeletonization of the images...
2018: PloS One
https://www.readbyqxmd.com/read/30061253/preoperative-evaluation-of-myometrial-invasion-in-endometrial-carcinoma-prospective-intra-individual-comparison-of-magnetic-resonance-volumetry-diffusion-weighted-and-dynamic-contrast-enhanced-magnetic-resonance-imaging
#8
COMPARATIVE STUDY
Stefan Felix Thieme, Federico Collettini, Jalid Sehouli, Lucio Biocca, Alessandra Lella, Moritz Wagner, Jumana Almuheimid, Helmut Plett, Mustafa Zelal Muallem
AIM: The purpose of this prospective study was to compare the diagnostic performance of diffusion-weighted (DWI) and dynamic contrast-enhanced imaging (DCE) and volumetric analyses in the preoperative assessment of myometrial invasion in patients with endometrial carcinoma. MATERIALS AND METHODS: Thirty-five patients with endometrial cancer underwent preoperative magnetic resonance imaging including DWI and DCE for evaluation of the depth of myometrial invasion and volumetric analyses [tumor volume (TV), uterine volume (UV), tumor to volume ratio (TVR=(TV/TU)×100)]...
August 2018: Anticancer Research
https://www.readbyqxmd.com/read/30046567/accuracy-of-preoperative-ct-liver-volumetry-in-living-donor-hepatectomy-and-its-clinical-implications
#9
Sanjay Goja, Sanjay Kumar Yadav, Amardeep Yadav, Tarun Piplani, Amit Rastogi, Prashant Bhangui, Sanjiv Saigal, Arvinder Singh Soin
Background: An accurate preoperative volumetric assessment of donor liver is essential for successful living donor liver transplant by ensuring adequate remnant and graft recipient weight ratio (GRWR). Methods: The study cohort consisted of 744 right lobe (RL), 65 left lobe (LL) and 33 left lateral sector (LLS) grafts from July 2010 to January 2014. A semi-automated interactive commercial software called AW Volume share 6 was used for volumetry. Bland Altman plot was used for assessing the agreement between estimated graft weight (EGW) and actual graft weight (AGW)...
June 2018: Hepatobiliary Surgery and Nutrition
https://www.readbyqxmd.com/read/30042977/monitoring-radiation-treatment-effects-in-glioblastoma-flair-volume-as-significant-predictor-of-survival
#10
Matthew D Garrett, Ted K Yanagihara, Randy Yeh, Guy M McKhann, Michael B Sisti, Jeffrey N Bruce, Sameer A Sheth, Adam M Sonabend, Tony J C Wang
Glioblastoma is the most common adult central nervous system malignancy and carries a poor prognosis. Disease progression and recurrence after chemoradiotherapy are assessed via serial magnetic resonance imaging sequences. T2-weighted fluid-attenuated inversion recovery (FLAIR) signal is presumed to represent edema containing microscopic cancer infiltration. Here we assessed the prognostic impact of computerized volumetry of FLAIR signal in the peri-treatment setting for glioblastoma. We analyzed pre- and posttreatment FLAIR sequences of 40 patients treated at the Columbia University Medical Center between 2011 and 2014, excluding those without high-quality FLAIR imaging within 2 weeks before treatment and 60 to 180 days afterward...
September 2017: Tomography: a Journal for Imaging Research
https://www.readbyqxmd.com/read/30040038/quantitative-susceptibility-mri-to-detect-brain-iron-in-amyotrophic-lateral-sclerosis
#11
Julio Acosta-Cabronero, Judith Machts, Stefanie Schreiber, Susanne Abdulla, Katja Kollewe, Susanne Petri, Nicola Spotorno, Joern Kaufmann, Hans-Jochen Heinze, Reinhard Dengler, Stefan Vielhaber, Peter J Nestor
Purpose To investigate the whole-brain landscape of iron-related abnormalities in amyotrophic lateral sclerosis (ALS) by using the in vivo MRI technique of quantitative susceptibility mapping (QSM). Materials and Methods For this prospective study, 28 patients with ALS (mean age, 61 years; age range, 43-77 years; 18 men [mean age, 61 years; range, 43-77 years] and 10 women [mean age, 61 years; range, 47-74 years]) recruited between January 17, 2014, and September 4, 2015, and 39 matched control subjects (mean age, 61 years; age range, 39-77 years; 24 men [mean age, 62 years; range, 39-77 years] and 15 women [mean age, 59 years; range, 39-73 years]) were examined by using structural and susceptibility 3...
July 24, 2018: Radiology
https://www.readbyqxmd.com/read/30024781/longitudinal-changes-in-brain-volumetry-and-cognitive-functions-after-moderate-and-severe-diffuse-axonal-injury
#12
Fabrício Stewan Feltrin, Ana Luiza Zaninotto, Vinícius M P Guirado, Fabiola Macruz, Daniel Sakuno, Mariana Dalaqua, Luiz Gustavo Antunes Magalhães, Wellingson Silva Paiva, Almir Ferreira de Andrade, Maria C G Otaduy, Claudia C Leite
BACKGROUND AND OBJECTIVE: Diffuse axonal injury (DAI) induces a long-term process of brain atrophy and cognitive deficits. The goal of this study was to determine whether there are correlations between brain volume loss, microhaemorrhage load (MHL) and neuropsychological performance during the first year after DAI. METHODS: Twenty-four patients with moderate or severe DAI were evaluated at 2, 6 and 12 months post-injury. MHL was evaluated at 3 months, and brain volumetry was evaluated at 3, 6 and 12 months...
July 19, 2018: Brain Injury: [BI]
https://www.readbyqxmd.com/read/30015798/the-accuracy-of-left-ventricular-and-left-atrial-volumetry-using-64-slice-computed-tomography-in-vitro-validation-study-with-human-cardiac-cadaveric-casts
#13
Vesa Järvinen, Valtteri Uusitalo, Tuula Tolvanen, Antti Saraste, Jouni Kuusisto, Juha Sinisalo, Juhani Knuuti
OBJECTIVE: We aimed to validate the accuracy of imaging of left atrial and ventricular volumes using cardiac cadaveric silicone casts. METHODS: Left atrial (n = 14) and ventricular (n = 15) casts were imaged using 64-slice computed tomography (CT). Water displacement (WD) of cardiac casts was used as the gold standard for volume measurements. RESULTS: Compared with WD, CT resulted in slightly higher left atrial and ventricular volumes (54 ± 25 vs 56 ± 26 mL [P = 0...
July 14, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30005629/evaluation-of-electrical-impedance-tomography-for-determination-of-urinary-bladder-volume-comparison-with-standard-ultrasound-methods-in-healthy-volunteers
#14
Dorothea Leonhäuser, Carlos Castelar, Thomas Schlebusch, Martin Rohm, Rüdiger Rupp, Steffen Leonhardt, Marian Walter, Joachim O Grosse
BACKGROUND: Continuous non-invasive urinary bladder volume measurement (cystovolumetry) would allow better management of urinary tract disease. Electrical impedance tomography (EIT) represents a promising method to overcome the limitations of non-continuous ultrasound measurements. The aim of this study was to compare the measurement accuracy of EIT to standard ultrasound in healthy volunteers. METHODS: For EIT of the bladder a commercial device (Goe MF II) was used with 4 different configurations of 16 standard ECG electrodes attached to the lower abdomen of healthy participants...
July 13, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29994875/quantification-of-chronic-lymphedema-in-a-revised-mouse-model
#15
Mads Gustaf Jørgensen, Navid Mohammadpour Toyserkani, Christian Rønn Hansen, Svend Hvidsten, Christina Baun, Eva Kildall Hejbøl, Henrik Daa Schrøder, Jens Ahm Sørensen
BACKGROUND: Lymphedema is a common and debilitating complication following cancer treatment with surgical lymph node excision and radiotherapy. Currently there are no curative treatments for lymphedema. Animal models that intended to replicate the disease have been inadequate, making a troublesome transition from experimental therapeutic studies into the clinic. It is therefore imperative to establish an experimental animal model that can reliably replicate clinical lymphedema. METHODS: To discover the optimal method of lymphedema induction, surgical lymph ablation and irradiation or silicone splint emplacement were combined in 8 experimental groups (n = 4)...
July 10, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29972077/pancreas-volume-in-health-and-disease-a-systematic-review-and-meta-analysis
#16
Steve V DeSouza, Ruma G Singh, Harry D Yoon, Rinki Murphy, Lindsay D Plank, Maxim S Petrov
The pancreas plays a central role in metabolism and is involved in the pathogenesis of several diseases. Pancreas volume is a holistic quantitative measure of pancreas size but the clinical relevance of pancreas volumetry is poorly understood. Areas covered: The aim was to systematically review studies in adults that used computed tomography or magnetic resonance imaging to measure pancreas volume in health and disease, to determine normal pancreas volume range, and to quantify changes in pancreas volume that are associated with disease...
August 2018: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29966517/evaluation-of-a-commercial-multi-dimensional-echocardiography-technique-for-ventricular-volumetry-in-small-animals
#17
Jana Grune, Annelie Blumrich, Sarah Brix, Sarah Jeuthe, Cathleen Drescher, Tilman Grune, Anna Foryst-Ludwig, Daniel Messroghli, Wolfgang M Kuebler, Christiane Ott, Ulrich Kintscher
BACKGROUND: The assessment of ventricular volumes using conventional echocardiography methods is limited with regards to the need of geometrical assumptions. In the present study, we aimed to evaluate a novel commercial system for three-dimensional echocardiography (3DE) in preclinical models by direct comparison with conventional 1D- and 2D-echocardiography (1DE; 2DE) and the gold-standard technique magnetic resonance imaging (MRI). Further, we provide a standard operating protocol for image acquisition and analysis with 3DE...
July 3, 2018: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/29963271/risk-factors-of-ineffective-drainage-in-uncovered-self-expandable-metal-stenting-for-unresectable-malignant-hilar-biliary-strictures
#18
Koji Takahashi, Toshio Tsuyuguchi, Atsushi Saiga, Takuro Horikoshi, Yoshihiko Ooka, Harutoshi Sugiyama, Masato Nakamura, Junichiro Kumagai, Mutsumi Yamato, Yotaro Iino, Ayako Shingyoji, Hiroshi Ohyama, Shin Yasui, Rintaro Mikata, Yuji Sakai, Naoya Kato
Aim: In this study, we assessed the factors contributing to ineffective drainage in the initial transpapillary uncovered self-expandable metal stent (USEMS) placements in patients with unresectable malignant hilar biliary strictures (UMHBSs) (Bismuth type II or higher). Methods: This was a retrospective, single-center study. A total of 97 patients with UMHBSs who underwent technically successful initial USEMS placements using endoscopic retrograde cholangiopancreatography (ERCP) were classified into the effective drainage group (n = 73) or the ineffective drainage group (n = 24)...
June 15, 2018: Oncotarget
https://www.readbyqxmd.com/read/29961173/magnetic-resonance-based-pelvimetry-and-tumor-volumetry-can-predict-surgical-difficulty-and-oncologic-outcome-in-locally-advanced-mid-low-rectal-cancer
#19
Gulsen Atasoy, Naciye Cigdem Arslan, Funda Dinc Elibol, Ozgul Sagol, Funda Obuz, Selman Sokmen
PURPOSE: To investigate the impact of the pelvic dimensions and tumor volume on surgery in locally advanced rectal cancer. METHODS: Patients who underwent open surgery after neoadjuvant long-course chemoradiation for primary rectal cancer were included. The predictive value of magnetic resonance-based pelvic measurements and tumor volume on the surgical difficulty and oncologic outcome were analyzed. RESULTS: 125 patients were included. The independent risk factors related to the circumferential resection margin status were the pT stage [odds ratio (OR) 3...
June 30, 2018: Surgery Today
https://www.readbyqxmd.com/read/29951535/semiautomatic-volumetry-of-low-attenuation-of-thoracic-aortic-plaques-on-curved-planar-reformations-using-mdct-angiographic-data-with-0-5-mm-collimation
#20
Kenji Mizutani, Izumi Torimoto, Zenjiro Sekikawa, Toshiaki Nishii, Takashi Kawasaki, Keiichiro Kasama, Takahisa Goto, Shigeo Takebayashi
To evaluate the relationship of aortic low attenuation plaque volume (LAPV) on multidetector computed tomography (MDCT) with the abdominal aortic aneurysm (AAA), the coronary arterial disease (CAD, ≥50% stenosis), severe (≥90% stenosis) CAD, hypertension, and long-term (≥10 years) hypertension. Curved planar reformations (CPR) of three segments (the ascending, the arch, and the upper descending aorta) of the thoracic aorta were generated with attenuation-dependent color codes to measure LAPV with 0~29 HU and total noncalcified plaque volume (TNPV) with 0~150 HU in 95 patients...
2018: BioMed Research International
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