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https://www.readbyqxmd.com/read/29161579/correlation-between-lung-perfusion-blood-volume-and-spect-images-in-patients-with-chronic-thromboembolic-pulmonary-hypertension-by-balloon-pulmonary-angioplasty
#1
Hirofumi Koike, Eijun Sueyoshi, Ichiro Sakamoto, Masataka Uetani, Tomoo Nakata, Kouji Maemura
OBJECTIVES: We evaluated the reperfusion by balloon pulmonary angioplasty (BPA) in lung PBV and SPECT images. METHODS: In total, 17 patients and 57 sessions were evaluated. Pre-BPA and post-BPA lung PBV and SPECT/CT images, based on both anatomical segments and physiologic regions (upper/middle/lower) were compared. RESULTS: BPA had a positive effect on most hypoperfused/unperfused segments/regions. There was generally a high rate of agreement between PBV measurements and SPECT/CT...
November 11, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/29160929/anatomical-variations-of-the-human-cochlea-determined-from-micro-ct-and-high-resolution-ct-imaging-and-reconstruction
#2
Jie Tang, Xianglong Tang, Zhenhua Li, YiKang Liu, SongHua Tan, Heng Li, RongDan Ke, Zhi Wang, Li Gong, AnZhou Tang
Understanding the anatomical variations in the human cochlea are important for cochlear implants. This study examined these variations using a reconstructed fusion model of the skull and temporal bone. The 3D digital model of the temporal bone was reconstructed from multiple axial micro-CT scans of temporal bone and high resolution CT (HRCT) of the skull from 15 cadavers. A skull model was reconstructed and merged with the reconstructed temporal bone. The 3D relationship between the cochlea and the skull's mid-sagittal plane was analyzed...
November 21, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29160917/visualization-of-calcium-phosphate-cement-in-teeth-by-zero-echo-time-1-h-mri-at-high-field
#3
Weiqiang Dou, Simone Mastrogiacomo, Andor Veltien, Hamdan S Alghamdi, X Frank Walboomers, Arend Heerschap
(1) H magnetic resonance imaging (MRI) by a zero echo time (ZTE) sequence is an excellent method to image teeth. Calcium phosphate cement (CPC) materials are applied in the restoration of tooth lesions, but it has not yet been investigated whether they can be detected by computed tomography (CT) or MRI. The aim of this study was to optimize high-field ZTE imaging to enable the visualization of a new CPC formulation implanted in teeth and to apply this in the assessment of its decomposition in vivo. CPC was implanted in three human and three goat teeth ex vivo and in three goat teeth in vivo...
November 21, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/29160399/marginal-and-internal-adaptation-of-zirconia-crowns-a-comparative-study-of-assessment-methods
#4
Rafael Schlögel Cunali, Rafaella Caramori Saab, Gisele Maria Correr, Leonardo Fernandes da Cunha, Bárbara Pick Ornaghi, André V Ritter, Carla Castiglia Gonzaga
Marginal and internal adaptation is critical for the success of indirect restorations. New imaging systems make it possible to evaluate these parameters with precision and non-destructively. This study evaluated the marginal and internal adaptation of zirconia copings fabricated with two different systems using both silicone replica and microcomputed tomography (micro-CT) assessment methods. A metal master model, representing a preparation for an all-ceramic full crown, was digitally scanned and polycrystalline zirconia copings were fabricated with either Ceramill Zi (Amann-Girrbach) or inCoris Zi (Dentslpy-Sirona), n=10...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29160397/mechanical-preparation-showed-superior-shaping-ability-than-manual-technique-in-primary-molars-a-micro-computed-tomography-study
#5
Lídia Regina da Costa Hidalgo, Léa Assed Bezerra da Silva, Graziela Bianchi Leoni, Jardel Francisco Mazzi-Chaves, Emily Eduardo da Silva Carvalho, Alberto Consolaro, Manoel Damião Sousa-Neto
The aim of the study was to evaluate canal preparation in primary molars with hand files, ProTaper Next and Self-Adjusting File (SAF) by 2D and 3D micro-computed tomography (micro-CT) analysis. Canals of 24 primary molars were prepared with hand files (HF), ProTaper Next (PTN) and SAF (n=8/group). The teeth were scanned before and after root canal preparation and the pre- and postoperative micro-CT images were reconstructed. Changes in 2D (area, perimeter, roundness, minor and major diameter) and 3D [volume, surface area, structure model index (SMI)] morphological parameters, as well as canal transportation and lateral perforations were evaluated (Kruskal-Wallis and ANOVA; a=0...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29160180/incidental-findings-on-fdg-pet-ct-in-head-and-neck-cancer
#6
Christopher J Britt, Austin M Maas, Tabassum A Kennedy, Gregory K Hartig
Objective 18F-fluoro-deoxy-glucose positron emission tomography/computed tomography (FDG PET/CT) imaging is common in head and neck cancer and often identifies incidental findings that necessitate additional patient evaluations. Our goal was to assess the frequency and nature of these incidental imaging findings on FDG-PET/CT. Study Design Retrospective cohort study. Setting Tertiary medical center. Subjects and Methods All patients with head and neck cancer who had undergone FDG-PET/CT imaging between January 2014 and June 2015 at our institution were evaluated for incidental findings...
November 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29160168/cerebral-blood-volume-lesion-extent-predicts-functional-outcome-in-patients-with-vertebral-and-basilar-artery-occlusion
#7
Fana Alemseged, Darshan G Shah, Andrew Bivard, Timothy J Kleinig, Nawaf Yassi, Marina Diomedi, Francesca Di Giuliano, Gagan Sharma, Roy Drew, Bernard Yan, Richard J Dowling, Steven Bush, Fabrizio Sallustio, Carlo Caltagirone, Nicola B Mercuri, Roberto Floris, Mark W Parsons, Christopher R Levi, Peter J Mitchell, Stephen M Davis, Bruce Cv Campbell
Background CT perfusion may improve diagnostic accuracy in posterior circulation stroke. The posterior circulation Acute Stroke Prognosis Early CT score (pc-ASPECTS) on Computed Tomography Angiography source images (CTA-SI) predicts functional outcome in patients with basilar artery occlusion. Aims We assessed the prognostic value of pc-ASPECTS on CT perfusion in patients with vertebral and basilar artery occlusion (VBAO) in comparison with CTA-SI. Methods Whole-brain CT perfusion from consecutive stroke patients with VBAO at four stroke centers was retrospectively analyzed...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/29160142/structural-fat-grafting-to-improve-outcomes-of-vocal-folds-fat-augmentation-long-term-results
#8
Giovanna Cantarella, Riccardo F Mazzola, Michele Gaffuri, Elisabetta Iofrida, Pietro Biondetti, Laura V Forzenigo, Lorenzo Pignataro, Sara Torretta
Objective Evaluating the long-term outcomes of vocal fold structural fat grafting. Study Design Case series with chart review. Setting University hospital. Subjects and Methods Seventy-nine dysphonic patients (16-82 years; 55 with unilateral laryngeal paralysis and 24 with vocal fold scarring) underwent vocal fold fat injection. Fat was harvested by low-pressure liposuction and then processed by centrifugation. Refined fat aliquots were placed in the vocal fold and paraglottic space in multiple tunnels to enhance graft neovascularization...
November 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29160113/superficial-siderosis-of-central-nervous-system-with-unknown-cause-report-of-2-cases-and-review-of-the-literature
#9
Hao Chen, Hafiz Khuram Raza, Jia Jing, Xinchun Ye, Zuohui Zhang, Fang Hua, Guiyun Cui
OBJECTIVE: To report 2 cases of superficial siderosis of central nervous system (SS-CNS) and a review of the literature. METHODS: We have analyzed the clinical data and relevant features of two patients with SS-CNS who were presented with ataxia and slurred speech. Both patients undertook blood tests, lumbar puncture, head CT (computer tomography) scans, and brain and spinal cord magnetic resonance (MR) scans. In addition, the first patient also undewent enhanced susceptibility-weighted angiography (ESWAN) and the second patient undertook susceptibility weighted imaging (SWI) scan...
November 21, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/29160082/cyclic-versus-noncyclic-chelating-scaffold-for-89zr-labeled-zegfr-2377-affibody-bioconjugates-targeting-epidermal-growth-factor-receptor-overexpression
#10
Dominik Summer, Javad Garousi, Maryam Oroujeni, Bogdan Mitran, Ken G Andersson, Anzhelika Vorobyeva, John Löfblom, Anna Orlova, Vladimir Tolmachev, Clemens Decristoforo
Zirconium-89 is an emerging radionuclide for positron emission tomography (PET) especially for biomolecules with slow pharmacokinetics as due to its longer half-life, in comparison to fluorine-18 and gallium-68, imaging at late time points is feasible. Desferrioxamine B (DFO), a linear bifunctional chelator (BFC) is mostly used for this radionuclide so far but shows limitations regarding stability. Our group recently reported on fusarinine C (FSC) with similar zirconium-89 complexing properties but potentially higher stability related to its cyclic structure...
November 21, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29160005/investigation-of-parameters-predicting-the-need-for-diagnostic-imaging-beyond-computed-tomography-in-the-evaluation-of-dogs-with-thoracolumbar-myelopathy-retrospective-evaluation-of-555-dogs
#11
Lee Emery, Silke Hecht, Xiaocun Sun
Thoracolumbar myelopathy encompasses a number of disease processes such as intervertebral disc disease, discospondylitis, trauma, congenital malformations, neoplasia, and intramedullary spinal cord disease. Compressive disc herniations are most common in dogs and require imaging procedures such as myelography, computed tomography (CT), and/or magnetic resonance imaging (MRI) to determine the need and location for decompressive surgery. The purposes of this retrospective, cross-sectional study were to evaluate all dogs undergoing thoracolumbar CT imaging as the initial diagnostic step between 2010 and 2015 and determine whether any of the imaging characteristics could be used to predict the need for additional imaging in the form of myelography, CT myelography, and/or MRI...
November 20, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29159958/evaluation-of-a-low-risk-mild-traumatic-brain-injury-and-intracranial-hemorrhage-emergency-department-observation-protocol
#12
Brian J Yun, Pierre Borczuk, Lulu Wang, Stephen Dorner, Benjamin A White, Ali S Raja
OBJECTIVES: Among emergency physicians, there is wide variation in admitting practices for patients who suffered a mild traumatic brain injury (TBI) with an intracranial hemorrhage (ICH). The purpose of this study was to evaluate the effects of implementing a protocol in the emergency department (ED) observation unit for patients with mild TBI and ICH. METHODS: This retrospective cohort study was approved by the Institutional Review Board. Study subjects were patients ≥18 years of age with an International Classification of Diseases (ICD) code corresponding to a traumatic IC, and admitted to an ED observation unit (EDOU) of an urban, academic level 1 trauma center between February 1, 2015 and January 31, 2017...
November 20, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/29159941/the-role-of-off-focus-radiation-in-scatter-correction-for-dedicated-cone-beam-breast-ct
#13
Linxi Shi, Srinivasan Vedantham, Andrew Karellas, Lei Zhu
PURPOSE: Dedicated cone beam breast CT (CBBCT) suffers from x-ray scatter contamination. We aim to identify the source of the significant difference between the scatter distributions estimated by two recent methods proposed by our group and to investigate its effect on CBBCT image quality. METHOD: We recently proposed two novel methods of scatter correction for CBBCT, using a library based (LB) technique and a forward projection (FP) model. Despite similar enhancement on CBBCT image qualities, these two methods obtain very different scatter distributions...
November 21, 2017: Medical Physics
https://www.readbyqxmd.com/read/29159925/the-use-of-micro-ct-imaging-to-examine-and-illustrate-fetal-skeletal-abnormalities-in-dutch-belted-rabbits-and-to-prove-concordance-with-alizarin-red-stained-skeletal-examination
#14
Howard M Solomon, Stacia Murzyn, Joyce Rendemonti, Sharon Chapman, Tinamarie Skedzielewski, Beat M Jucker, Dinesh Stanislaus, Hasan Alsaid
OBJECTIVES: In our laboratory we evaluated the use of micro-computed tomography (micro-CT) using a high resolution acquisition protocol and fetuses obtained on Gestation Day (GD) 29 (mating = GD 0). METHODS: To show concordance between traditional Alizarin Red S stain and micro-CT skeletal examination methods, 103 fetuses from 19 untreated Dutch belted rabbits were obtained by cesarean section and stored frozen. The fetuses were thawed, imaged and examined digitally by micro-CT, then stained and re-examined using traditional methods...
November 21, 2017: Birth defects research
https://www.readbyqxmd.com/read/29159886/radiomics-in-lung-cancer-its-time-is-here
#15
Mannudeep Kalra, Ge Wang, Colin G Orton
Of the 8.8 million deaths from cancer in 2015, per the World Health Organization, lung cancer was the most common cause of death (1.69 million). With the introduction of low-dose CT for lung cancer screening and emergence of precision medicine for often-fatal lung cancer, there is a need for deep access to critical information, i.e. radiomics, not possible with conventional subjective interpretation of CT images. Quantitative image analyses for radiomics have been applied in lung cancers to determine their spatial complexity, genomic composition, viability or aggressiveness, and responses to targeted therapies...
November 21, 2017: Medical Physics
https://www.readbyqxmd.com/read/29159885/two-stage-ionoacoustic-range-verification-leveraging-monte-carlo-and-acoustic-simulations-to-stably-account-for-tissue-inhomogeneity-and-accelerator-specific-time-structure-a-simulation-study
#16
Sarah K Patch, Daniel E M Hoff, Tyler B Webb, Lee G Sobotka, Tianyu Zhao
PURPOSE: Range errors constrain treatment planning by limiting choice of ion beam angles and requiring large margins. Ionoacoustic range verification requires recovering the location of an acoustic source from low frequency signals. A priori information is applied to stably overcome resolution limits of inverse acoustic source imaging in this simulation study. In particular, the accuracy and robustness of ionoacoustic range verification for lateral and oblique delivery of high-energy protons to the prostate is examined...
November 20, 2017: Medical Physics
https://www.readbyqxmd.com/read/29159674/the-quadrant-method-measuring-four-points-is-as-a-reliable-and-accurate-as-the-quadrant-method-in-the-evaluation-after-anatomical-double-bundle-acl-reconstruction
#17
Yuta Mochizuki, Takao Kaneko, Keisuke Kawahara, Shinya Toyoda, Norihiko Kono, Masaru Hada, Hiroyasu Ikegami, Yoshiro Musha
PURPOSE: The quadrant method was described by Bernard et al. and it has been widely used for postoperative evaluation of anterior cruciate ligament (ACL) reconstruction. The purpose of this research is to further develop the quadrant method measuring four points, which we named four-point quadrant method, and to compare with the quadrant method. METHODS: Three-dimensional computed tomography (3D-CT) analyses were performed in 25 patients who underwent double-bundle ACL reconstruction using the outside-in technique...
November 20, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29159606/preoperative-68-ga-dota-somatostatin-analog-pet-ct-hybrid-imaging-increases-detection-rate-of-intra-abdominal-small-intestinal-neuroendocrine-tumor-lesions
#18
Olov Norlén, Harald Montan, Per Hellman, Peter Stålberg, Anders Sundin
BACKGROUND: Small intestinal neuroendocrine tumors (SI-NETs) are the most common form of neoplasm in the small bowel. Radiological identification of primary tumors (PT), which may be multiple, is difficult, and therefore palpation of the entire small bowel is routinely performed during laparotomy. The aim was to determine detection rates of PT and peritoneal carcinomatosis (PC) with (68)Ga-DOTATOC/TATE-PET/CT in comparison with i.v. contrast-enhanced computed tomography (CE-CT) and thus to clarify whether modern functional imaging can mitigate the need for palpation of bowel during surgery enabling oncologically adequate laparoscopic resection...
November 20, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/29159572/comparison-of-positron-emission-tomography-computed-tomography-and-magnetic-resonance-imaging-for-posttherapy-evaluation-in-patients-with-advanced-cervical-cancer-receiving-definitive-concurrent-chemoradiotherapy
#19
Tzu-Pei Su, Gigin Lin, Yu-Ting Huang, Feng-Yuan Liu, Chun-Chieh Wang, Angel Chao, Hung-Hsueh Chou, Tzu-Chen Yen, Chyong-Huey Lai
PURPOSE: Our purpose was to assess the diagnostic performance of positron emission tomography/computed tomography (PET/CT) and pelvic/abdominal magnetic resonance imaging (MRI) after concurrent chemoradiotherapy (CCRT) for posttherapy evaluation in patients with advanced cervical cancer. METHODS: Patients with cervical squamous cell carcinoma, either with advanced FIGO stage or with positive pelvic or para-aortic lymph node (PALN), received PET/CT using [(18)F]fluorodeoxyglucose and MRI including diffusion-weighted imaging between 2 and 3 months after CCRT completion...
November 20, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29159525/hepatic-tumors-of-vascular-origin-imaging-appearances
#20
Eric C Ehman, Michael S Torbenson, Michael L Wells, Brian T Welch, Scott M Thompson, Ishan Garg, Sudhakar K Venkatesh
A number of benign and malignant neoplasms may arise from the vascular elements within the liver parenchyma. Lesions discussed in this article include angiosarcoma, epithelioid hemangioendothelioma, solitary fibrous tumor (hemangiopericytoma), infantile, and cavernous hemangiomas. Despite a common theme of vascular origin, the pathologic and imaging appearance of these entities can be heterogeneous. Angiosarcomas are bizarrely enhancing, highly aggressive tumors, which often present with metastatic disease...
November 20, 2017: Abdominal Radiology
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