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https://www.readbyqxmd.com/read/29783280/pericardial-cyst-cause-of-sudden-cardiac-death
#1
Marie Brix Ley, Maiken Kudahl Larsen
Cardiovascular disease is the leading cause of sudden death in the world. The etiology of sudden cardiac death involves a wide range of diseases, but seldom pericardial cysts. A pericardial cyst is an uncommon cyst usually located in the middle mediastinum and rarely in the posterior part. They are usually harmless and asymptomatic. Here, we present a case of a 63-year-old woman who presented with dyspnea and hoarseness, but died suddenly after a CT scan was attempted. The detailed forensic pathologic and histologic examination revealed a pericardial cyst located in the posterior mediastinum...
May 21, 2018: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/29783140/congenital-diaphragmatic-disease-an-unusual-presentation-in-adulthood-case-report
#2
Angela Gurrado, Roberta Maria Isernia, Alessandro De Luca, Valentina Ferraro, Daniela Virgintino, Anna Napoli, Giuseppe Cavallaro, Eugenio Maiorano, Angela Pezzolla, Mario Testini
INTRODUCTION: Congenital diaphragmatic disease is a quite common condition that usually occurs in the neonatal period, and the diagnosis of congenital diaphragmatic disease in adulthood is rare. CASE PRESENTATION: A 64-years-old Caucasian woman was admitted in emergency at our Department, due to a bowel obstruction and dyspnea. A CT-scan showed a diaphragmatic herniation in the left area, with malposition of dilated transverse and descending colon in the chest. An emergency laparatomy was performed, showing a toxic megacolon, in the absence of a true diaphragmatic hernia, and a left diaphragm and left liver hypoplasia...
May 7, 2018: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29782657/phantom-clinical-and-texture-indices-evaluation-and-optimization-of-a-penalized-likelihood-image-reconstruction-method-q-clear-on-a-bgo-pet-ct-scanner
#3
Gabriel Reynés-Llompart, Cristina Gámez-Cenzano, José Luís Vercher-Conejero, Aida Sabaté-Llobera, Nahúm Calvo-Malvar, Josep M Martí-Climent
INTRODUCTION: The aim of this study was to evaluate the behavior of a penalized-likelihood image reconstruction method (Q.Clear) under different count statistics and lesion-to-background ratios (LBR) on a BGO scanner, in order to obtain an optimum penalization factor (β value) to study and optimize for different acquisition protocols and clinical goals. METHODS: Both phantom and patient images were evaluated. Data from an image quality phantom were acquired using different Lesion-to-Background ratios and acquisition times...
May 21, 2018: Medical Physics
https://www.readbyqxmd.com/read/29782653/data-driven-gating-in-pet-influence-of-respiratory-signal-noise-on-motion-resolution
#4
Florian Büther, Iris Ernst, Lynn Johann Frohwein, Joost Pouw, Klaus Peter Schäfers, Lars Stegger
PURPOSE: Data-driven gating (DDG) approaches for positron emission tomography (PET) are interesting alternatives to conventional hardware-based gating methods. In DDG, the measured PET data themselves are utilized to calculate a respiratory signal that is subsequently used for gating purposes. The success of gating is then highly dependent on the statistical quality of the PET data. In this study we investigate how this quality determines signal noise and thus motion resolution in clinical PET scans using a center-of-mass-based (COM) DDG approach, specifically with regard to motion management of target structures in future radiotherapy planning applications...
May 21, 2018: Medical Physics
https://www.readbyqxmd.com/read/29782606/-68-ga-psma-and-11-c-choline-comparison-using-a-tri-modality-pet-ct-mri-3-0-t-system-with-a-dedicated-shuttle
#5
Omar Alonso, Gerardo Dos Santos, Margarita García Fontes, Henia Balter, Henry Engler
Background: The aim of this study was to prospectively compare the detection rate of 68 Ga-PSMA versus 11 C-Choline in men with prostate cancer with biochemical recurrence and to demonstrate the added value of a tri-modality PET/CT-MRI system. Methods: We analysed 36 patients who underwent both 11 C-Choline PET/CT and 68 Ga-PSMA PET/CT scanning within a time window of 1-2 weeks. Additionally, for the 68 Ga-PSMA scan, we used a PET/CT-MRI (3.0 T) system with a dedicated shuttle, acquiring MRI images of the pelvis...
2018: Eur J Hybrid Imaging
https://www.readbyqxmd.com/read/29782597/low-dose-radiation-18f-fluoride-pet-ct-in-the-assessment-of-unilateral-condylar-hyperplasia-of-the-mandible-preliminary-results-of-a-single-centre-experience
#6
G M Lima, S Diodato, E Costabile, G Cicoria, S Civollani, C Marchetti, P L Guidalotti, C Pettinato, C Nanni, S Fanti
Background: Unilateral condylar hyperplasia (UCH) of the mandible, or Hypercondylia, is a pathological condition that determines an abnormal growth of the affected condyle.Bone SPECT with Tc99m-diphosphonates is a successful tool in the diagnosis of UCH. EANM guidelines also suggest the use of 18F-NaF PET/CT, though it leads to a higher radiation exposure. Aim: As UCH patients are young, we aimed to develop a low dose 18F-Fluoride PET/CT protocol and compare it to a standard injected activity scan, to assess if the image quality remains unchanged...
2018: Eur J Hybrid Imaging
https://www.readbyqxmd.com/read/29782595/the-clinical-value-of-xspect-ct-bone-versus-spect-ct-a-prospective-comparison-of-200-scans
#7
Iain Duncan, Nicholas Ingold
Purpose: To prospectively evaluate the clinical utility of xSPECT/CT Bone, a new reconstruction algorithm for single photon emission tomography (SPECT), and compare it with standard SPECT/CT reconstruction. Methods: Sequential reporting of SPECT/CT followed by xSPECT/CT images in 200 sequential cases commencing August 2015. Differences between the initial SPECT/CT and the final report (after xSPECT/CT reconstruction) were documented and analysed. 12-18 months after the initial study follow-up, clinical data was sought from a subset of cases in which xSPECT/CT changed the primary diagnosis and imaging correlation undertaken in all patients who subsequently had MRI or CT scans of the same region...
2018: Eur J Hybrid Imaging
https://www.readbyqxmd.com/read/29782588/ground-glass-pulmonary-nodules-their-significance-in-oncology-patients-and-the-role-of-computer-tomography-and-18f-fluorodeoxyglucose-positron-emission-tomography
#8
Laura Evangelista, Annalori Panunzio, Elena Scagliori, Paolo Sartori
Objective: to determine the clinical significance of ground glass pulmonary nodules, either pure (GGNs) or mixed with the presence of solid component (MPNs), in patients with known pulmonary or extra-thoracic malignancies and to evaluate the role of computed tomography (CT) and positron emission tomography (PET)/CT in their diagnosis and follow-up. Methods: A total of 130 nodules in 68 patients were revealed: 119 GGNs and 11 MPNs. GGN lesions were found in 58 patients, MPNs in eight, and in two cases, both...
2018: Eur J Hybrid Imaging
https://www.readbyqxmd.com/read/29782393/clinical-and-prognostic-value-of-18f-fdg-pet-ct-in-restaging-of-pancreatic-cancer
#9
Domenico Albano, Demetrio Familiari, Roberta Gentile, Salvatore Scalisi, Federico Midiri, Marco Messina, Massimiliano Spada, Maria C Fornito, Massimo Galia, Massimo Midiri, Pierpaolo Alongi
AIM: The aim of this retrospective multicentre study was to evaluate the clinical and prognostic effect of fluorine-18-fluorodeoxyglucose (F-FDG)-PET/computed tomography (CT) in the restaging process of pancreatic cancer (PC). MATERIALS AND METHODS: Data from patients treated for primary PC, who underwent F-FDG-PET/CT for suspicious of disease progression, were collected. Accuracy was assessed employing conventional diagnostic procedures, multidisciplinary team case notes, further F-FDG-PET/CT scans and/or follow-up...
May 18, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29781451/comparisons-of-the-computed-tomographic-scan-and-panoramic-radiography-before-mandibular-third-molar-extraction-surgery
#10
Qian Luo, Wanglun Diao, Lan Luo, Yong Zhang
BACKGROUND Mandibular third molar extraction surgery has a postoperative complication of hypoesthesia of the lower lip and/or chin. The objective of the study was to determine if preoperative radiographic examination by panoramic radiography and computed tomography (CT) scan can predict postoperative complications of mandibular third molar extraction surgery. MATERIAL AND METHODS In total, 479 patients who had mandibular third molar extraction surgery were included in this cross-sectional study. Patients had panoramic radiographies and CT scans to determine the relationship of the tooth, the canal, and the buccolingual position...
May 21, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29781224/influence-of-different-drilling-preparation-on-cortical-bone-a-biomechanical-histological-and-micro-ct-study-on-sheep
#11
Michele Stocchero, Marco Toia, Yohei Jinno, Francesca Cecchinato, Jonas P Becktor, Yoshihito Naito, Anders Halldin, Ryo Jimbo
OBJECTIVE: The aim of this study was to investigate the extent of cortical bone remodeling between two different drilling protocols by means of histomorphometric, µ-CT, and biomechanical analyses. MATERIAL AND METHODS: A total of 48 implants were inserted into the mandible of six sheep following two drilling protocols: Group A (Test, n = 24), undersized preparation; Group B (Control, n = 24), non-undersized preparation. The animals were euthanatized to obtain 5 and 10 weeks of implantation time...
May 20, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29781194/paraneoplastic-autoimmune-encephalitis-associated-with-pleomorphic-lung-carcinoma-an-autopsy-case-report
#12
Takashi Ando, Yoji Goto, Kazuo Mano, Fumio Nomura, Masako Kurashige, Masafumi Ito, Maya Mimuro, Yasushi Iwasaki, Masahisa Katsuno, Mari Yoshida
A 64-year-old man was admitted with acute onset disturbed consciousness. Cerebrospinal fluid analysis revealed pleocytosis and elevated protein, with negative cultures and PCR. Serum antibodies for autoimmune encephalitis were also negative. Brain magnetic resonance imaging (MRI) was unremarkable, but whole-body CT scan showed a tumor in the left lower lung lobe. Bronchial brush cytology demonstrated clusters of malignant cells, and 18 F-fluorodeoxyglucose positron emission tomography showed multiple lesions and increased uptake in the lung tumor...
May 20, 2018: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/29781166/evaluation-of-the-rostral-projection-of-the-sacral-lamina-as-a-component-of-degenerative-lumbosacral-stenosis-in-german-shepherd-dogs
#13
Harvey Saunders, Andrew J Worth, Janis P Bridges, Angela Hartman
OBJECTIVE: To determine the association between a greater rostral projection of the sacral lamina and clinical signs of cauda equina syndrome (CES) in German shepherd dogs (GSD) with presumptive degenerative lumbosacral disease (DLSS). STUDY DESIGN: Retrospective cohort study. SAMPLE POPULATION: One hundred forty-three GSD (125 police dogs and 18 pet dogs) presenting for either CES or prebreeding evaluation. Fifty-five were classified as affected by CES and diagnosed with DLSS, and 88 were classified as unaffected on the basis of clinical and imaging findings...
May 20, 2018: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/29780728/intimal-re-layering-technique-for-type-a-acute-aortic-dissection-reconstructing-the-intimal-layer-continuity-to-induce-remodeling-of-the-false-channel
#14
Eugenio Neri, Enrico Tucci, Giulio Tommasino, Giulia Guaccio, Carmelo Ricci, Pierleone Lucatelli, Marco Cini, Roberto Ceresa, Antonio Benvenuti, Luigi Muzzi
Background: Residual false channel is common after repair of type A acute aortic dissection (TAAAD). Starting from our recent series of TAAAD patients we carried out a retrospective analysis, regarding the failure of primary exclusion at the time of the initial operation. We classified the location of the principal entry tears perfusing the residual false channel. The proposed technique represents our attempt to correct the mechanism of false channel perfusion during primary repair. We describe a new technique designed to address some limitations of standard hemiarch aortic replacement...
2018: Journal of Visualized Surgery
https://www.readbyqxmd.com/read/29780633/deep-learning-aided-decision-support-for-pulmonary-nodules-diagnosing-a-review
#15
REVIEW
Yixin Yang, Xiaoyi Feng, Wenhao Chi, Zhengyang Li, Wenzhe Duan, Haiping Liu, Wenhua Liang, Wei Wang, Ping Chen, Jianxing He, Bo Liu
Deep learning techniques have recently emerged as promising decision supporting approaches to automatically analyze medical images for different clinical diagnosing purposes. Diagnosing of pulmonary nodules by using computer-assisted diagnosing has received considerable theoretical, computational, and empirical research work, and considerable methods have been developed for detection and classification of pulmonary nodules on different formats of images including chest radiographs, computed tomography (CT), and positron emission tomography in the past five decades...
April 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29780626/malignant-solitary-pulmonary-nodules-assessment-of-mass-growth-rate-and-doubling-time-at-follow-up-ct
#16
Jingxu Li, Tingting Xia, Xinguan Yang, Xiao Dong, Jiamin Liang, Nanshan Zhong, Yubao Guan
Background: The differentiation of benign and malignant solitary pulmonary nodules (SPNs), especially subsolid nodules, is still challenging because of the small size, slow growth, and atypical imaging characteristics of these nodules. We aimed to determine the significance of mass growth rate (MGR) and mass doubling time (MDT) at follow-up CT of malignant SPNs. Methods: This retrospective study included 167 patients (169 SPNs, diameter 8-30 mm). Among the 169 SPNs, 114 malignant SPNs were classified into three types: pure ground-glass nodules (pGGNs), part-solid nodules (pSNs), and solid nodules (SNs)...
April 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29780575/community-acquired-infection-to-raoultella-ornithinolytica-presenting-as-appendicitis-and-shock-in-a-healthy-individual
#17
Roy Hajjar, Frank Schwenter, Shih-Hann Su, Marie-Christine Gasse, Herawaty Sebajang
Raoultella ornithinolytica and Raoultella planticola are histamine-producing bacteria that are usually found in fish and water. They are associated with scombroid syndrome that presents with vomiting and flushing. A wide range of infections with these germs is reported, but mainly in fragile hospitalized patients with multiple comorbidities. We report the case of a 54-year-old healthy patient who presented with 24-hours abdominal pain, vomiting, flushing and shock. The abdominal examination showed guarding in the right lower quadrant (RLQ), and the abdominal CT scan images showed a thickened terminal ileum and a distended appendix...
May 2018: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/29780231/predictors-of-shunt-dependent-hydrocephalus-following-aneurysmal-subarachnoid-hemorrhage-a-pilot-study-in-a-single-egyptian-institute
#18
Hashem M Aboul-Ela, Ahmed M Salah El-Din, Ahmed A Zaater, Mohamed Shehab, Ossama A El Shahawy
Background: Acute hydrocephalus can cause neurological deterioration after aneurysmal subarachnoid hemorrhage (aSAH). Predicting which patient would require shunting is challenging. Methods: This prospective study was conducted upon twenty patients who suffered acute hydrocephalus due to subarachnoid hemorrhage of ruptured aneurysms. Surgical or non-surgical management of hydrocephalus was conducted. Glasgow Coma scale (GCS) was assessed, and hydrocephalus was graded by bicaudate index...
2018: Egypt J Neurol Psychiatr Neurosurg
https://www.readbyqxmd.com/read/29779973/impact-of-device-host-interaction-on-paravalvular-aortic-regurgitation-with-different-transcatheter-heart-valves
#19
Ramón Rodríguez-Olivares, Nahid El Faquir, Zouhair Rahhab, Lennart van Gils, Ben Ren, Rafi Sakhi, Marcel L Geleijnse, Ron van Domburg, Peter P T de Jaegere, Jose L Zamorano Gómez, Nicolas M Van Mieghem
AIMS: We sought to evaluate the interaction of different aortic root phenotypes with self-expanding (SEV), balloon-expandable (BEV) and mechanically expanded (MEV) and the impact on significant aortic regurgitation. METHODS AND RESULTS: We included 392 patients with a SEV (N = 205), BEV (N = 107) or MEV (N = 80). Aortic annulus eccentricity index and calcification were measured by multi-slice CT scan. Paravalvular aortic regurgitation was assessed by contrast aortography (primary analysis) and transthoracic echocardiography (secondary analysis)...
May 6, 2018: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29779936/early-response-assessment-on-mid-treatment-computed-tomography-predicts-for-locoregional-recurrence-in-oropharyngeal-cancer-patients-treated-with-definitive-radiation-therapy
#20
Rafi Kabarriti, N Patrik Brodin, George Lundgren, Nitin Ohri, Wolfgang A Tomé, Shalom Kalnicki, Madhur K Garg
PURPOSE: To evaluate whether a response assessment using mid-treatment computed tomography (CT) scans during definitive radiation therapy (RT) for oropharyngeal head and neck cancer can predict for locoregional recurrence (LRR). METHODS AND MATERIALS: Head and neck cancer patients who receive RT at our institution undergo CT repeat scans at the 15th fraction, with treatment replanning in the case of an inadequate dose to gross disease or an increased dose to organs at risk...
April 6, 2018: International Journal of Radiation Oncology, Biology, Physics
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