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Radiodiagnosis

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https://www.readbyqxmd.com/read/29747904/optimization-by-monte-carlo-method-of-photon-fluence-from-the-x-ray-beam-spectrum-in-a-bimodal-tomographic-system
#1
H Olaya Davila, S A Martínez-Ovalle, H F Castro Serrato, H R Vega-Carrillo
A bimodal tomographic system with a RTW MCBM 65B-50Mo X-ray tube and a XPAD3s semiconductor camera that contains 8 bars, each one with 67,200 hybrid pixels are modeled in GEANT4 simulation code. Several conical X-ray spectra were simulated, particularly a spectrum with a peak energy of 17.4 keV used in tomography on small animals. Three phantoms located in the tomographic center were added to the simulation to evaluate the image quality and its magnification based on the simulation of different photon fluences and the rotation effect of the tomographic system with an average angular velocity of 360o per minute...
April 28, 2018: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29744317/prospective-randomized-comparative-study-to-evaluate-epidural-fibrosis-and-surgical-outcome-in-patients-undergoing-lumbar-laminectomy-with-epidural-autologous-free-fat-graft-or-gelfoam-a-preliminary-study
#2
Shivender Sobti, Ashwani Grover, B Paul S John, Sarvpreet Singh Grewal, Uttam B George
Introduction: Epidural fibrosis (EF) contributes to unsatisfactory relief of symptoms and failed back syndrome after spine surgery. EF around the nerve root can be more refractory to treatment than the original disc herniation itself. Reoperation on the scar can produce more scarring. Few studies have been conducted regarding the type of material to be used for decreasing EF. Materials and Methods: The prospective randomized comparative study was conducted in the Department of Neurosurgery and Radiodiagnosis, of a tertiary care hospital...
April 2018: International Journal of Applied and Basic Medical Research
https://www.readbyqxmd.com/read/29699004/-effect-of-low-dose-ionizing-radiation-exposure-on-thyroid-function-in-a-medical-occupational-population
#3
L Tu, S L Wang, Q Dong, H Y Song, X T Li, C P Tan, X Dong
Objective: We evaluated the effect of low-dose of ionizing radiation on thyroid function of medical occupational group with long-term exposure; furthermore; we analyzed the relationship between the thyroid hormones and the risk factors; such as exposure length; department. Ultimately; providing the scientific basis for setting the ionizing radiation protection standards. Methods: The population who engaged radiodiagnosis and radiotherapy in a tertiary-A hospital were set up as occupational exposure; 724 medical professionals as the research object...
February 20, 2018: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/29692519/doppler-indices-of-superior-thyroid-artery-in-clinically-euthyroid-adults
#4
Upendra Kumar Joish, Y Kavitha, R Harikiran Reddy, Anitha S Prabhu, M Chetan Kumar, M C Siddharth
Context: Ultrasonography of thyroid gland is a frequently performed investigation. Many of the diffuse thyroid pathologies are associated with altered vascularity. In view of potential applications and scant available data, there is a need to find normal values of Doppler indices of superior thyroid artery (STA). Aims: To find the normal range of Doppler indices like mean peak systolic velocity (PSV), resistivity index (RI), and pulsatility index (PI) of STA in clinically euthyroid adult individuals...
January 2018: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/29688213/-splenic-artery-aneurysm-masked-by-postcholecystectomy-syndrome
#5
A E Shkliaev, N Iu Denisova, Iu V Kulikov
Visceral artery aneurysms appear to belong to uncommon and potentially lethal vascular diseases. They are usually revealed accidentally during an ultrasonographic examination, magnetic resonance imaging, or computed tomography. Described in the article is a clinical case report concerning a sacciform aneurysm of the splenic artery, detected in a 53-year-old woman presenting with postcholecystectomy syndrome and followed up for abdominalgia by therapeutists and gastroenterologists. Timely performed radiodiagnosis (including multispiral computed tomography and angiography of the abdominal vessels) made it possible not only to detect the aneurysm, having thus verified the volumetric formation previously found on ultrasonographic examination, but to take adequate measures aimed at preventing rupture of the aneurysm and consisting in endovascular occlusion of the aneurysmatic cavity with metal spirals...
2018: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/29607691/effects-of-ionizing-radiation-on-bio-active-plant-extracts-useful-for-preventing-oxidative-damages
#6
Nadia Mulinacci, Alessio Valletta, Valentina Pasqualetti, Marzia Innocenti, Camilla Giuliani, Maria Bellumori, Giulia De Angelis, Alessia Carnevale, Vittoria Locato, Cristina Di Venanzio, Laura De Gara, Gabriella Pasqua
Humans are exposed to ionizing radiations in medical radiodiagnosis and radiotherapy that cause oxidative damages and degenerative diseases. Airplane pilots, and even more astronauts, are exposed to a variety of potentially harmful factors, including cosmic radiations. Among the phytochemicals, phenols are particularly efficient in countering the oxidative stress. In the present study, different extracts obtained from plant food, plant by-products and dietary supplements, have been compared for their antioxidant properties before and after irradiation of 140 cGy, a dose absorbed during a hypothetical stay of three years in the space...
April 2, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29484975/the-clustered-dna-lesions-types-pathways-of-repair-and-relevance-to-human-health
#7
Barbara Bukowska, Boleslaw T Karwowski
The clustered DNA lesions are a characteristic feature of ionizing radiation and are defined as two or more damage sites formed within 20 bps after the passage of a single radiation track. The clustered DNA lesions are divided into two major groups: double-stranded breaks (DSBs) and non-DSB clusters also known as Oxidatively-induced Clustered DNA Lesions (OCDLs), which could involve either two opposing strands or the same strand. As irradiation is gaining greater interest in cancer treatment as well as in imaging techniques, the detailed knowledge of its genotoxicity and the mechanisms of repair of radiation-induced DNA damage remain issues to explore...
February 25, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29386721/combat-radiology-challenges-and-opportunities
#8
Vivek Sharma, C M Sreedhar, J Debnath
Radiology services in a combat situation are essentially centred on assisting the battle field physicians/surgeons to save/salvage life and limb. Timely and accurate detection of type and mapping of extent of injury can aid in making imaging based triage which can be of immense help to the treating physicians/trauma surgeons. With the availability of rapid assessment (clinical as well as imaging based) and quick transport facility, the focus has gradually been shifting from merely limb-saving to life-saving strategies...
October 2017: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/29322704/evaluation-of-cerebral-venous-thrombosis-by-ct-mri-and-mr-venography
#9
Pratibha Issar, Sirasapalli Chinna, Sanjeev Kumar Issar
Objective: To study and compare cerebral parenchymal changes and sinuses involvement in CT with MRI and MRV in Cerebral Venous Thrombosis patients. Method: This study was carried out in the Department of Radiodiagnosis, JLN Hospital and Research Center, Bhilai, Chhattisgarh from October 2012 to Nov 2014 and includes fifty patients of all age groups presenting with clinical symptoms of CVT, admitted in Neurology, Neurosurgery, Medicine, Pediatric, obstetric and Gynecology wards...
November 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29093778/incorporation-of-whole-spine-screening-in-magnetic-resonance-imaging-protocols-for-low-back-pain-a-valuable-addition
#10
Akhilesh Rao, Atul Mishra, Yayati Pimpalwar, Ravinder Sahdev, Neha Yadu
Study Design: A retrospective review of lumbar magnetic resonance imaging (MRI) studies conducted at the Department of Radiodiagnosis & Imaging of a Tertiary Care Armed Forces Hospital between May 2014 and May 2016. Purpose: To assess the advantages of incorporating sagittal screening of the whole spine in protocols for conventional lumbar spine MRI for patients presenting with low back pain. Overview of Literature: Advances in MRI have resulted in faster examinations, particularly for patients with low back pain...
October 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/29090027/evaluation-of-multidetector-computed-tomography-in-haematuria
#11
Ranjan Kumar, Raj Kumar Airon, Amit Mittal, Rikki Singal, Kamal Sharma, Samita Singal
AIMS AND OBJECTIVES: (1) To study the role of multidetector computed tomography in patients with haematuria. (2) To correlate multidetector computed tomography findings with clinical outcome/laboratory findings/FNAC and/or operative findings (wherever performed). MATERIAL AND METHODS: The present study was carried out in the Department of Radiodiagnosis, M.M. Institute of Medical Sciences and Research, Mullana, Ambala, from April 2014 to 2016. Fifty patients with complaint of haematuria, referred from various wards and outpatient departments of this institution, were included...
June 2017: Mædica
https://www.readbyqxmd.com/read/28969239/magnetic-resonance-imaging-in-paediatric-spinal-dysraphism-with-comparative-usefulness-of-various-magnetic-resonance-sequences
#12
Deepakkumar Vinodary Mehta
INTRODUCTION: Spinal dysraphism occurs due to failure of fusion of parts along dorsal aspect of midline structures lying along spinal axis from skin to vertebrae and spinal cord. Congenital spinal anomalies may be minimal and asymptomatic like spinal bifida occulta, or severe with marked neurological deficits like Arnold-Chiari malformation or caudal regression syndrome. Magnetic Resonance Imaging (MRI) is the modality of choice to diagnose mild to severe spinal dysraphism. AIM: To diagnose type and extent of clinically suspected spinal anomalies by MRI scan and to compare various sequences for identifying neural tissue and fatty tissue in anomalies...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28969104/sonographic-estimation-of-umbilical-cord-cross-section-area-and-its-reference-value-in-normal-pregnancy
#13
Khizer Hussain Afroze, Subhash Lakshmi Prabha, V Chandrakala, M Deepak
INTRODUCTION: The routine antenatal sonographic investigations of the umbilical cord are limited for assessment of number of umbilical vessels and doppler evaluation of umbilical blood flow. With the advancements of the sonographic techniques it is now possible to have more detailed evaluation of umbilical cord. There exist only few literatures on assessment of umbilical cord cross-sectional area during pregnancy to provide a baseline reference value. AIM: To establish the reference intervals of cross-sectional area of the umbilical cord during gestation and to find the correlation of umbilical cord cross-sectional area with the foetal anthropometric measurements...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28892998/role-of-multi-detector-ct-mdct-in-evaluation-of-bowel-diseases
#14
Mohamad Tufail Sheikh, Mohd Tafazul Sheikh, Masrat Jan, Hayat A Khan, Guru P Vashisht, Mohd L Wani
INTRODUCTION: Multi-Detector Computed Tomography (MDCT) has revealed excellent results in various systems of the body. Its role in abdominal imaging for solid viscera has been proved beyond doubt. It is an emerging non invasive tool for evaluation of bowel diseases. AIM: To see the efficacy of MDCT in evaluation of various bowel diseases. MATERIALS AND METHODS: The study was carried out in the Department of Radiodiagnosis and Imaging, Batra Hospital and Medical Research Centre, Delhi, India...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28892996/pelvic-mass-lesions-in-females-tissue-characterization-capability-of-mri
#15
Pramod Ramchand Shaha, Rahul Khetawat, Kulamani Sahoo, Ashish Garg, Mohd Abbas Ilyas, Gaurav Khairnar, Sahil Garg, Shree Hari Budgemwar
INTRODUCTION: Magnetic Resonance Imaging (MRI) of adult female pelvis is a well-established tool in the evaluation of utero-ovarian lesions and is often used to supplement ultrasonography. The need for diagnostic surgical intervention has largely been eclipsed with the advent of MRI, which has become the imaging modality of choice for characterization of pelvic masses. AIM: To assess the role of MRI in female pelvic mass lesions and to exploit the tissue characterization capability of MRI...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28673491/assessment-of-volumetric-distortion-artifact-in-filled-root-canals-using-different-cone-beam-computed-tomographic-devices
#16
Berkan Celikten, Reinhilde Jacobs, Karla deFaria Vasconcelos, Yan Huang, Laura Ferreira Pinheiro Nicolielo, Kaan Orhan
INTRODUCTION: Artifacts in cone-beam computed tomographic (CBCT) imaging may compromise radiodiagnosis. Obturation materials for endodontic treatment may present with variable material density and thus also cause distinct artifact expression. The aim of this study was to assess the volume distortion artifact of root canal sealers using CBCT devices and micro-CT imaging as a reference. METHODS: Thirty single-root mandibular central incisors were used for this study...
September 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28658872/mri-evaluation-of-local-extent-of-carcinoma-cervix-is-post-contrast-imaging-needed-in-every-case
#17
Joish Upendra Kumar, Ramireddy Harikiran Reddy, Pallavi Sinha, Niveditha Kodali, Vivek Sreekanth
INTRODUCTION: Carcinoma cervix is widely prevalent among women in developing countries. Post contrast Magnetic Resonance Imaging (MRI) utilising spin echo T1 weighted sequence with fat suppression is widely practiced as part of evaluation of carcinoma cervix. However, it is unclear if such post contrast imaging provides any additional information other than adding to the cost of imaging. AIM: To find accuracy of T1 and T2 weighted non contrast MRI protocol in comparison with post contrast spin echo T1 weighted fat suppressed imaging in evaluating the local extent of the carcinoma cervix...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28574052/-aneurysm-of-the-gastroduodenal-artery-in-a-female-patient-with-the-postcholecystectomy-syndrome-a-clinical-case-report
#18
A E Shkliaev, A G Bessonov, Iu V Gorbunov, O V Muravtseva, K B Klestov, S Iu Zykov
Aneurysms of visceral arteries appear to belong to rare and potentially lethal vascular diseases. The most important role in the aetiology of aneurysms of the gastroduodenal artery is plaid by either acute or chronic pancreatitis. The article deals with a clinical case report concerning a saccular partially thrombosed aneurysm having developed in a 77-year-old woman presenting with the postcholecystectomic syndrome and detected on ultrasonographic examination of the abdominal-cavity vessels. Timely radiodiagnosis (SCT angiography of abdominal cavity vessels), adequate and timely performed endovascular occlusion of the cavity of the aneurysm with metal spirals performed in a timely manner made it possible to attain a favourable outcome...
2017: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/27904222/functional-and-computed-tomography-correlation-of-femoral-and-tibial-tunnels-in-single-bundle-anterior-cruciate-ligament-reconstruction-use-of-accessory-anteromedial-portal
#19
Naveen Joseph Mathai, Rajkumar S Amaravathi, K V Pavan, Padmanabhan Sekaran, Gaurav Sharma, Belliappa Codanda
BACKGROUND: An accessory anteromedial portal (AAMP) has been shown to be effective in placing an anatomically ideal femoral tunnel. It is well known that this is due to the independent femoral drilling which is possible with the AAMP. However very little is known regarding the significance of this reconstruction technique in influencing the functional outcomes of anatomic anterior cruciate ligament reconstruction (ACLR). This study documents the influence of tibial and femoral tunnel positions on functional outcomes of anatomic ACLR using the AAMP...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27833778/magnetic-resonance-imaging-analysis-of-caudal-regression-syndrome-and-concomitant-anomalies-in-pediatric-patients
#20
Deb K Boruah, Dhaval D Dhingani, Sashidhar Achar, Arjun Prakash, Antony Augustine, Shantiranjan Sanyal, Manoj Gogoi, Kangkana Mahanta
OBJECTIVE: The aim of this study was to evaluate the magnetic resonance imaging (MRI) findings of caudal regression syndrome (CRS) and concomitant anomalies in pediatric patients. MATERIALS AND METHODS: A hospital-based cross-sectional retrospective study was conducted. The study group comprised 21 pediatric patients presenting to the Departments of Radiodiagnosis and Pediatric Surgery in a tertiary care hospital from May 2011 to April 2016. All patients were initially evaluated clinically followed by MRI...
2016: Journal of Clinical Imaging Science
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