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https://www.readbyqxmd.com/read/29399975/diagnostic-imaging-of-ankle-syndesmosis-injuries-a-general-review
#1
REVIEW
John J Kellett, Gregory A Lovell, David A Eriksen, Matthew J Sampson
Literature on the various techniques for imaging injuries to the ankle syndesmosis to determine the most appropriate imaging modality for diagnosing syndesmosis ligament disruption and instability was reviewed using the following data sources: Pubmed, Google scholar, SportsDiscus, E-journals and PLOSone. Search terms used were: syndesmosis paired with injury, imaging, radiology, X-ray, stress X-ray, arthrography, ultrasound, nuclear medicine scan, CT scan, MRI and arthroscopy. Articles were selected by reading abstracts and the full article if indicated...
April 2018: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/29286497/a-modern-view-on-the-effect-of-ionizing-radiation-on-patients-with-diagnosis-of-nuclei-cell-cancer-and-its-dischariationn
#2
Yu O Mytsyk, Yu B Borys, I V Datz, L V Manyuk, O S Ilchyshyn, O Ya Soldatenko, I V Danyleychenko, I O Makogonov, N M Skaletska
One of the effects of the ionizing radiation on the cell is the emergence of genetic mutations which may lead to cancer development. The patients' exposure dose during diagnostics of renal cell carcinoma (RCC) by means of ordinary CT amounts to 5 mGy (5 mSv) and it can rise up to 50 mGy (5mSV) in the setting of multiphase scan. Until recent times, the evaluation of a risk for the cancer development caused by such relatively small doses of radiation exposure has been considered unnecessary. Nowadays, the influence of ionizing radiation during diagnostic pro cedures has been proved to increase the risk of cancer development significantly...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29275455/early-detection-of-metastases-using-whole-body-mri-for-initial-staging-and-routine-follow-up-of-myxoid-liposarcoma
#3
Natalia Gorelik, Santhosh Mauvva Venkatesh Reddy, Robert E Turcotte, Krista Goulding, Sungmi Jung, Thierry Alcindor, Thomas I Powell
OBJECTIVE: To define the role of whole-body MRI (WBMRI) for initial staging and routine follow-up of myxoid liposarcoma (MLS). MATERIALS AND METHODS: A retrospective review of all the patients with MLS who underwent WBMRI for initial staging and routine follow-up at our institution between October 1, 2006, and September 30, 2016 was performed. Patient demographics, clinical presentation, imaging findings, tumor histology, and occurrence and location of metastatic disease were recorded...
March 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29192363/quantitative-and-visual-assessments-toward-potential-sub-msv-or-ultrafast-fdg-pet-using-high-sensitivity-tof-pet-in-pet-mri
#4
Spencer C Behr, Emma Bahroos, Randall A Hawkins, Lorenzo Nardo, Vahid Ravanfar, Emily V Capbarat, Youngho Seo
PURPOSE: Newer high-performance time-of-flight (TOF) positron emission tomography (PET) systems have the capability to preserve diagnostic image quality with low count density, while maintaining a high raw photon detection sensitivity that would allow for a reduction in injected dose or rapid data acquisition. To assess this, we performed quantitative and visual assessments of the PET images acquired using a highly sensitive (23.3 cps/kBq) large field of view (25-cm axial) silicon photomultiplier (SiPM)-based TOF PET (400-ps timing resolution) integrated with 3 T-MRI in comparison to PET images acquired on non-TOF PET/x-ray computed tomography (CT) systems...
November 30, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29186008/pet-attenuation-correction-for-flexible-mri-surface-coils-in-hybrid-pet-mri-using-a-3d-depth-camera
#5
Lynn J Frohwein, Mirco Heß, Dominik Schlicher, Konstantin Bolwin, Florian Büther, Xiaoyi Jiang, Klaus P Schäfers
PET attenuation correction for flexible MRI radio frequency surface coils in hybrid PET/MRI is still a challenging task, as position and shape of these coils conform to large inter-patient variabilities. The purpose of this feasibility study is to develop a novel method for the incorporation of attenuation information about flexible surface coils in PET reconstruction using the Microsoft Kinect V2 depth camera. The depth information is used to determine a dense point cloud of the coil's surface representing the shape of the coil...
January 17, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29099615/interrater-reliability-and-radiation-dosage-of-oblique-coronal-computed-tomography-for-sacroiliitis-in-comparison-with-axial-computed-tomography
#6
COMPARATIVE STUDY
Sheng-Guang Li, Xiangyuan Liu, Huiqiong Zhou, Qing Zhang
OBJECTIVE: Sacroiliitis, a prerequisite to the diagnosis of ankylosing spondylitis, can be ascertained by CT when MRI is not available. Oblique coronal CT is an increasingly popular approach when examining sacroiliitis. The goal of this study was to understand how oblique coronal CT compared with axial CT scanning in terms of raters' concordance when diagnosing sacroiliitis. METHODS: 52 subjects < 45 years of age at onset of their chronic lower back pain were sequentially scanned by X-ray, axial CT and oblique coronal CT...
January 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29080274/low-dose-ct-perfusion-with-projection-view-sharing
#7
Thomas Martin, John Hoffman, Jeff R Alger, Michael McNitt-Gray, Danny Jj Wang
PURPOSE: CT Perfusion (CTP) is a widely used clinical imaging modality. However, CTP typically involves the use of substantial radiation dose (CTDIvol ≥~200 mGy). The purpose of this study is to present a low-dose CTP technique using a projection view-sharing reconstruction algorithm originally developed for dynamic MRI - "K-space Weighted Image Contrast" (KWIC). METHODS: The KWIC reconstruction is based on an angle-bisection scheme. In KWIC, a Fourier transform was performed along each projection to form a "k-space"-like CT data space, based on the central-slice theorem...
January 2018: Medical Physics
https://www.readbyqxmd.com/read/29076458/feasibility-of-mr-only-proton-dose-calculations-for-prostate-cancer-radiotherapy-using-a-commercial-pseudo-ct-generation-method
#8
Matteo Maspero, Cornelis A T van den Berg, Guillaume Landry, Claus Belka, Katia Parodi, Peter R Seevinck, Bas W Raaymakers, Christopher Kurz
A magnetic resonance (MR)-only radiotherapy workflow can reduce cost, radiation exposure and uncertainties introduced by CT-MRI registration. A crucial prerequisite is generating the so called pseudo-CT (pCT) images for accurate dose calculation and planning. Many pCT generation methods have been proposed in the scope of photon radiotherapy. This work aims at verifying for the first time whether a commercially available photon-oriented pCT generation method can be employed for accurate intensity-modulated proton therapy (IMPT) dose calculation...
November 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29052774/intrathoracic-tuberculous-lymphadenopathy-in-children-a-guide-to-chest-radiography
#9
REVIEW
Anthony George, Savvas Andronikou, Tanyia Pillay, Pierre Goussard, Heather J Zar
Making the diagnosis of pulmonary tuberculosis in children can be difficult because microbiological confirmation is not often achieved. Diagnosis is therefore often based on clinical features in combination with chest radiograph findings. Chest radiographs can demonstrate lymphadenopathy of the hilar and para-tracheal regions on the anteroposterior view, and subcarinal lymphadenopathy on the lateral view. However poor interobserver agreement has been reported for radiologist and clinician assessment of lymphadenopathy...
September 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28894899/clinical-impact-of-psma-based-18-f-dcfbc-pet-ct-imaging-in-patients-with-biochemically-recurrent-prostate-cancer-after-primary-local-therapy
#10
Esther Mena, Maria L Lindenberg, Joanna H Shih, Stephen Adler, Stephanie Harmon, Ethan Bergvall, Deborah Citrin, William Dahut, Anita T Ton, Yolanda McKinney, Juanita Weaver, Philip Eclarinal, Alicia Forest, George Afari, Sibaprasad Bhattacharyya, Ronnie C Mease, Maria J Merino, Peter Pinto, Bradford J Wood, Paula Jacobs, Martin G Pomper, Peter L Choyke, Baris Turkbey
PURPOSE: The purpose of our study was to assess18 F-DCFBC PET/CT, a PSMA targeted PET agent, for lesion detection and clinical management of biochemical relapse in prostate cancer patients after primary treatment. METHODS: This is a prospective IRB-approved study of 68 patients with documented biochemical recurrence after primary local therapy consisting of radical prostatectomy (n = 50), post radiation therapy (n = 9) or both (n = 9), with negative conventional imaging...
January 2018: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28881335/the-great-mimicker-at-thoracolumbar-spine-non-hodgkin-s-lymphoma
#11
Turgut Akgül, Yücel Bilgin, Gökhan Karademir
PURPOSE: To report two cases with Non-Hodgkin's Lymphoma (NHL) in thoracolumbar spine with very different presentation. METHODS: Case 1; An 84-year-old female patient was admitted to our emergency clinic with paraparesis in both lower extremities. Magnetic resonance imaging (MRI) revealed an epidural mass at the level of the T12 vertebrae. She was operated immediately with wide laminectomy and posterior instrumentation because of the paraparesis of both lower extremities...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28861700/a-method-for-going-from-2d-laparoscope-to-3d-acquisition-of-surface-landmarks-by-a-novel-computer-vision-approach
#12
Marc Garbey, Toan B Nguyen, Albert Y Huang, Vid Fikfak, Brian J Dunkin
PURPOSE: This paper presents a method to use the Smart Trocars-our new surgical instrument recognition system-or any accurate localization system of surgical instrument for acquiring intraoperative surface data. Complex laparoscopic surgeries need a proper guidance system which requires registering the preoperative data from a CT or MRI scan to the intraoperative patient state. The Smart Trocar can be used to localize the instruments when it comes to contact with the soft tissue surface...
August 31, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28777024/quantitative-anatomical-comparison-of-the-ipsilateral-and-contralateral-interhemispheric-transcallosal-approaches-to-the-lateral-ventricle
#13
Evgenii Belykh, Kaan Yağmurlu, Ting Lei, Sam Safavi-Abbasi, Mark E Oppenlander, Nikolay L Martirosyan, Vadim A Byvaltsev, Robert F Spetzler, Peter Nakaji, Mark C Preul
OBJECTIVE The best approach to deep-seated lateral and third ventricle lesions is a function of lesion characteristics, location, and relationship to the ventricles. The authors sought to examine and compare angles of attack and surgical freedom of anterior ipsilateral and contralateral interhemispheric transcallosal approaches to the frontal horn of the lateral ventricle using human cadaveric head dissections. Illustrative clinical experiences with a contralateral interhemispheric transcallosal approach and an anterior interhemispheric transcallosal transchoroidal approach are also related...
August 4, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28685013/arthroscopic-approach-for-treating-a-pigmented-villonodular-sinovitis-of-tmj-a-case-report
#14
Maria Roman-Ramos, Paolo Cariati, Almudena Cabello-Serrano, Miguel Garcia-Martin, Blas Garcia-Medina
The present report describes the case of a 29-year-old man referred to our service for TMJ pain and progressive reduction of the mouth opening. Differential diagnostics included rheumatologic diseases, monoarthritis and intraarticular lumps. In this line, a face CT scan and a MRI of TMJ were carried out in order to ensure a proper diagnosis. These tests showed a solid lesion into the joint cavity. In view of that, we decided to perform a diagnostic and therapeutic arthroscopy of TMJ. Histopathological studies confirmed the diagnosis of pigmented villonodular synovitis...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28511550/ct-features-in-surgically-proven-cases-of-ovarian-torsion-a-pictorial-review
#15
Sunita Dhanda, Swee T Quek, Mok Y Ting, Clement Y H Rong, Eric Y S Ting, Pooja Jagmohan, Bernard Wee
Ovarian torsion is a surgical emergency characterized by a partial or complete rotation of the ovarian vascular pedicle, causing obstruction to venous outflow followed by arterial inflow. Clinically, ovarian torsion frequently mimics other causes of acute pelvic pain such as appendicitis, diverticulitis, renal colic etc. Ultrasonography is the first-line imaging modality of choice for evaluation of ovarian torsion. MRI is useful as a problem-solving tool in patients with equivocal or non-diagnostic ultrasonography studies...
October 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28368659/after-over-200-years-7-t-magnetic-resonance-imaging-reveals-the-foliate-structure-of-the-human-corpus-callosum-in-vivo
#16
Christopher J Wiggins, Andreas Schäfer, Bibek Dhital, Denis Le Bihan, Robert Turner
OBJECTIVE: A fine structure of the corpus callosum (CC), consisting of radial lines, is seen in historical anatomical atlases as far back as that of Vicq d'Azyr (1786). This study examines a similar pattern observed in vivo using high-resolution MR images at 7 T. METHODS: 8 healthy subjects were examined with 7.0-T MRI. Anatomical images were collected with a gradient echo scan with 0.5-mm isotropic resolution, which were rated for visibility of the radial pattern...
May 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28221151/-techniques-for-percutaneous-access-during-percutaneous-nephrolithotomy
#17
REVIEW
Daniel Pérez-Fentes
The creation of the access is one of the main steps in percutaneous nephrolithotomy, the most complicated for many urologists and the one that limited most the universalization of the technique. From a purely technical point of view, it includes puncture of the excretory tract and dilatation of the percutaneous tract to end with the introduction of an Amplatz type working sheath. The objective of the puncture is to try to access the excretory system through the renal papilla, minimizing the risk of bleeding...
January 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28219209/-value-of-99-tc-m-mdp-spect-ct-in-clinical-decision-making-for-nasopharyngeal-carcinoma-and-a-comparison-of-the-values-of-different-imaging-techniques-for-diagnosing-skull-base-bone-invasion
#18
COMPARATIVE STUDY
W Li, R S Zhang, L Q Zhang, B G Lu, W H Fu
Objective: To analyze the clinical value of SPECT/CT in diagnosis of skull base bone invasion and clinical decision-making for nasopharyngeal carcinoma (NPC), and to compare their diagnostic value with SPECT/CT, CT, MRI, and MRI combined with SPECT (MRI-SPECT) for skull base bone invasion. Methods: Before treatment, among 348 newly diagnosed NPC patients, CT scan was performed in 186 patients (group A) and the remaining 162 patients received MRI scan (group B). Clinical doctors then made clinical management decisions according to the CT or MRI results...
February 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28181822/oncogenic-osteomalacia-role-of-ga-68-dotanoc-pet-ct-scan-in-identifying-the-culprit-lesion-and-its-management
#19
Deepa Singh, Aditi Chopra, Mudalsha Ravina, Srikant Kongara, Eesh Bhatia, Narvesh Kumar, Sushil Gupta, Subhash Yadav, Preeti Dabadghao, Rajnikant Yadav, Veeresh Dube, Utham Kumar, Manish Dixit, Sanjay Gambhir
OBJECTIVE: The aim of this study was to evaluate the role of (68)Ga-DOTANOC positron emission tomography (PET)/CT scan in localization of culprit lesion for biopsy and required intervention [surgical excision/radiofrequency ablation (RFA)] in patients with long-standing oncogenic osteomalacia (OOM)/tumour-induced osteomalacia. METHODS: 17 patients (8 males and 9 females) underwent (68)Ga-DOTANOC PET/CT scan. The patients referred with clinical and biochemical evidence of hypophosphatemia and raised fibroblast growth factor-23...
April 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28048364/we-fg-207a-01-introduction-to-dedicated-breast-ct-early-studies
#20
S Vedantham
Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent. Its sensitivity, especially in dense breasts, is low due to overlapping tissue and the fact that normal breast tissue, benign lesions and breast cancers all have similar "densities", making lesion detection more difficult...
June 2016: Medical Physics
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