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Journal of Medical Imaging and Radiation Oncology

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https://www.readbyqxmd.com/read/27891826/ct-brain-perfusion-a-static-phantom-study-of-contrast-to-noise-ratio-and-radiation-dose
#1
Stewart M Midgley, Damien L Stella, Bruce Cv Campbell, Francesca Langenberg, Paul F Einsiedel
INTRODUCTION: Computed tomography perfusion (CTP) is increasingly employed in the diagnosis and management of ischaemic stroke but radiation dose can be significant and optimising contrast-to-noise ratio (CNR) is challenging. This study aimed to quantify and optimise the balance between CNR as a surrogate for image quality and radiation dose. METHODS: A perspex head phantom with vials of dilute contrast agent was scanned using a Siemens Definition Flash 128-slice scanner...
November 27, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27888585/discrepancy-rates-in-reporting-of-acute-stroke-ct
#2
Christopher Sj Astill, Marc J Agzarian
INTRODUCTION: With increasing after-hours workloads there has been reliance on registrars to report after-hours acute stroke CT scans at our institution. This practice was reviewed for the perceived possibility of error and poor patient outcomes by the reliance on after-hours registrar reports. Through an audit of 3 years of these studies, we proposed to investigate if our current practice is safe and whether it results in poor patient outcomes. METHODS: Following ethics approval, all after-hours acute stroke CT scan reports from September 2012 to August 2015 were identified using the PACS...
November 25, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27885810/value-of-18-f-fdg-pet-mri-for-the-outcome-of-ct-guided-facet-block-therapy-in-cervical-facet-syndrome-initial-results
#3
Lino M Sawicki, Benedikt M Schaarschmidt, Philipp Heusch, Christian Buchbender, Sandra Rosenbaum-Krumme, Lale Umutlu, Sven O Eicker, Andreas Bockisch, Gerald Antoch, Frank W Floeth
INTRODUCTION: The aim of this study was to evaluate the ability of (18) F-fluorodeoxyglucose positron emission tomography/magnetic resonance imaging ((18) F-FDG PET/MRI) to detect PET-positive cervical facet arthropathy and identify patients who benefit from facet block therapy. METHODS: Ten patients with cervical facet syndrome (mean age: 65 ± 12 years) underwent (18) F-FDG PET/MRI of the neck. Focal (18) F-FDG uptake in PET-positive facet joints served as target for computed tomography (CT)-guided facet blocks...
November 25, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27863028/utility-of-hybrid-spect-ct-in-primary-melanoma-lymphoscintigraphy-a-retrospective-case-series
#4
Khimling Tew, David Farlow
INTRODUCTION: Sentinel lymph node (SLN) biopsy is widely accepted as an important part of staging cutaneous malignant melanoma. Hybrid single photon emission computed tomography and computed tomography (SPECT/CT) may identify additional SLN and provide important information to the surgeon performing SLN biopsy. We report our experience at a major referral centre for melanoma surgery. METHODS: Retrospective case series of pre-operative sentinel node lymphoscintigraphy for primary melanoma over a consecutive 12-month period...
November 14, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27863010/survey-of-image-guided-radiotherapy-use-in-australia
#5
Vikneswary Batumalai, Lois Charlotte Holloway, Shivani Kumar, Kylie Dundas, Michael Geoffrey Jameson, Shalini Kavita Vinod, Geoff P Delaney
INTRODUCTION: This study aimed to evaluate the current use of imaging technologies for planning and delivery of radiotherapy (RT) in Australia. METHODS: An online survey was emailed to all Australian RT centres in August 2015. The survey inquired about imaging practices during planning and treatment delivery processes. Participants were asked about the types of image-guided RT (IGRT) technologies and the disease sites they were used for, reasons for implementation, frequency of imaging and future plans for IGRT use in their department...
November 9, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27860392/novel-ct-guided-biopsy-of-isolated-perineural-spread-of-adenoid-cystic-carcinoma-along-the-trigeminal-nerve-masquerading-as-chronic-trigeminal-neuropathy
#6
Xian Zhang Eric Yong, Jonathan Dillon, Paul Smith, Cesar Salinas-La Rosa, Ashu Jhamb
The differential diagnoses for chronic peripheral neuropathy are broad and diagnosing a cause can be challenging. We present a case of isolated perineural spread of adenoid cystic carcinoma to the trigeminal nerve involving skull base foramina and Meckel's cave in the setting of chronic trigeminal neuropathy and no known prior malignancy. Computed tomography-guided core (CT) needle biopsy was needed to arrive at a diagnosis and a novel approach was required to obtain tissue from the trigeminal nerve lesion at foramen ovale...
November 9, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27804280/cone-beam-computed-tomography-for-lung-cancer-validation-with-ct-and-monitoring-tumour-response-during-chemo-radiation-therapy
#7
Alissa Michienzi, Tomas Kron, Jason Callahan, Nikki Plumridge, David Ball, Sarah Everitt
INTRODUCTION: Cone-beam computed tomography (CBCT) is a valuable image-guidance tool in radiation therapy (RT). This study was initiated to assess the accuracy of CBCT for quantifying non-small cell lung cancer (NSCLC) tumour volumes compared to the anatomical 'gold standard', CT. Tumour regression or progression on CBCT was also analysed. METHODS: Patients with Stage I-III NSCLC, prescribed 60 Gy in 30 fractions RT with concurrent platinum-based chemotherapy, routine CBCT and enrolled in a prospective study of serial PET/CT (baseline, weeks two and four) were eligible...
November 2, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27804231/role-of-the-overall-treatment-time-of-radiotherapy-with-10%C3%A2-%C3%A3-%C3%A2-3%C3%A2-gy-for-outcomes-in-patients-with-metastatic-spinal-cord-compression
#8
Dirk Rades, Stefan Janssen, Antonio Jose Conde-Moreno, Jon Cacicedo, Michaela Metz, Theo Veninga, Barbara Segedin, Volker Rudat, Steven E Schild
INTRODUCTION: Radiotherapy alone still is the most commonly delivered treatment modality for metastatic spinal cord compression (MSCC). MSCC is an emergency situation, which requires treatment as soon as possible. When radiotherapy is performed with the most commonly used approach 10 × 3 Gy (30 Gy in 10 fractions) over 2 weeks, the question has been asked whether an overall treatment time (OTT) of 14-15 days including two weekends without irradiation leads to worse outcomes than OTT of 12 days (beginning of radiotherapy on a Monday resulting in only one weekend break)? METHODS: A total of 412 patients with MSCC were included in this retrospective study...
November 2, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27797163/burnout-stress-and-satisfaction-among-australian-and-new-zealand-radiation-oncology-trainees
#9
John Leung, Pilar Rioseco
INTRODUCTION: To evaluate the incidence of burnout among radiation oncology trainees in Australia and New Zealand and the stress and satisfaction factors related to burnout. METHODS: A survey of trainees was conducted in mid-2015. There were 42 Likert scale questions on stress, 14 Likert scale questions on satisfaction and the Maslach Burnout Inventory-Human Services Survey assessed burnout. A principal component analysis identified specific stress and satisfaction areas...
October 31, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27766769/magnetic-resonance-imaging-features-of-gemistocytic-astrocytoma
#10
Paul M Simkin, Natalie Yang, Alpha Tsui, Renate M Kalnins, Greg Fitt, Frank Gaillard
INTRODUCTION: Gemistocytic astrocytoma is the second most common subtype of World Health Organization grade 2 astrocytoma, but has a worse prognosis than other grade 2 lesions. We aim to describe the MR imaging features of histopathologically proven gemistocytic tumours. METHODS: Ethics approval was obtained from both institutions. Patient consent was not required for this retrospective study. We reviewed MR imaging findings of 16 consecutive cases of histopathologically proven gemistocytic astrocytoma and anaplastic astrocytoma with gemistocytic features...
October 21, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27766742/intracranial-translucency-assessment-at-first-trimester-nuchal-translucency-ultrasound
#11
Annah Lane, Ling Lee, Donna Traves, Andreas Lee
INTRODUCTION: The antenatal diagnosis of open spina bifida (OSB), a neural tube defect, is predominantly made at the second trimester morphology scan by ultrasound detection of structural abnormalities resulting from the associated Chiari II malformation. Evidence has emerged suggesting that these structural abnormalities can be detected earlier, by examination of the posterior fossa as part of the first trimester nuchal translucency scan. In particular, absence of the intra-cranial translucency (IT) of the fourth ventricle has shown promise as a diagnostic marker of OSB, although the sensitivity and specificity of this finding varies widely in the literature...
October 21, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27753281/occupational-burnout-among-radiographers-sonographers-and-radiologists-in-australia-and-new-zealand-findings-from-a-national-survey
#12
Nabita Singh, Kellie Knight, Caroline Wright, Marilyn Baird, Duane Akroyd, Robert D Adams, Michal E Schneider
INTRODUCTION: Evidence demonstrates that health care professionals are more prone to burnout than other professionals due to the emotionally taxing interactions they have with their patients on a daily basis. The aims of this study were to measure occupational burnout levels among sonographers, radiographers and radiologists and to examine predictors of burnout according to demographic characteristics. METHODS: A cross-sectional online survey was administered in 2010 to radiographers, sonographers and radiologists who were members of the following professional bodies: Australian Institute of Radiography, Australian Sonographers Association and The Royal Australian and New Zealand College of Radiologists...
October 18, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27753267/artefact-on-ct-brain-images-caused-by-the-presence-of-air-bubbles-in-the-cooling-oil-of-the-x-ray-tube
#13
Nelson Trieu, Ryan Xia, Robert Loneragan, Lloyd Ridley, Joseph Trieu
INTRODUCTION: We report a series of patients who had computed tomography (CT) of their brains which showed an uncommon artefact caused by excess air bubbles in the cooling oil around the X-ray tube. METHODS: In November and December 2015, it was recognised that artefacts appearing on CT brain images acquired at our department were caused by a scanner fault. The test images were reviewed and the service engineer for the CT scanner was questioned about the artefact cause...
October 18, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27753236/dermatofibrosarcoma-protuberans-a-comprehensive-review-on-the-spectrum-of-clinico-radiological-presentations
#14
Tony Ht Sung, Annie Cw Tam, Jennifer Ls Khoo
Dermatofibrosarcoma Protuberans (DFSP) is a rare malignant soft-tissue neoplasm which is often misdiagnosed due to its indolent clinical course and non-specific radiological appearances. An observation case series was conducted with retrospective review of clinical and radiological data of DFSP patients presenting to a major tertiary hospital in Hong Kong for radiological assessment between November 2006 and February 2016. Seven patients with confirmed histological diagnosis of DFSP were included. Tumour sizes at presentation ranged from 1 to 5 cm, most commonly (n = 6) occurred over chest wall and abdominal wall...
October 18, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27739229/accurate-tissue-characterization-in-low-dose-ct-imaging-with-pure-iterative-reconstruction
#15
Kevin P Murphy, Patrick D McLaughlin, Maria Twomey, Vincent E Chan, Fiachra Moloney, Adrian J Fung, Faimee E Chan, Tafline Kao, Siobhan B O'Neill, Benjamin Watson, Owen J O'Connor, Michael M Maher
INTRODUCTION: We assess the ability of low-dose hybrid iterative reconstruction (IR) and 'pure' model-based IR (MBIR) images to maintain accurate Hounsfield unit (HU)-determined tissue characterization. METHODS: Standard-protocol (SP) and low-dose modified-protocol (MP) CTs were contemporaneously acquired in 34 Crohn's disease patients referred for CT. SP image reconstruction was via the manufacturer's recommendations (60% FBP, filtered back projection; 40% ASiR, Adaptive Statistical iterative Reconstruction; SP-ASiR40)...
October 13, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27714925/diagnostic-reference-levels-for-digital-mammography-in-new-south-wales
#16
Moayyad E Suleiman, Mark F McEntee, Lucy Cartwright, Jennifer Diffey, Patrick C Brennan
INTRODUCTION: This work aims to explore radiation doses delivered in screening mammography in Australia, with a focus on whether compressed breast thickness should be used as a guide when determining patient derived diagnostic reference levels (DRLs). METHODS: Anonymized mammograms (52,405) were retrieved from a central database, and DICOM headers were extracted using third party software. Women with breast implants, breast thicknesses outside 20-110 mm and images with incomplete exposure or quality assurance (QA) data were excluded...
October 6, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27709834/-compromise-position-image-alignment-to-accommodate-independent-motion-of-multiple-clinical-target-volumes-during-radiotherapy-a-high-risk-prostate-cancer-example
#17
Tara Rosewall, Jing Yan, Hamideh Alasti, Carla Cerase, Andrew Bayley
INTRODUCTION: Inclusion of multiple independently moving clinical target volumes (CTVs) in the irradiated volume causes an image guidance conundrum. The purpose of this research was to use high risk prostate cancer as a clinical example to evaluate a 'compromise' image alignment strategy. METHODS: The daily pre-treatment orthogonal EPI for 14 consecutive patients were included in this analysis. Image matching was performed by aligning to the prostate only, the bony pelvis only and using the 'compromise' strategy...
October 5, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27709811/case-report-of-male-breast-cancer-detected-on-magnetic-resonance-imaging
#18
Seung Wook Ryu, Ken Ho, Sandra A O'Toole, Alison Green, Hae Won Kim
Male breast cancers (MBC) are rare, accounting for <1% of all breast cancers. The use of magnetic resonance imaging (MRI) for male breast cancer is not generally indicated. We present an unusual case where conventional imaging for a suspected MBC was equivocal and MRI was required to assist in diagnosis.
October 5, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27709810/diagnostic-performance-of-multi-slice-ct-angiography-combined-with-enterography-for-small-bowel-obstruction-and-intestinal-ischaemia
#19
Bosheng He, Jinhua Gu, Sheng Huang, Xuesong Gao, Jinhe Fan, Meihong Sheng, Lin Wang, Shenchu Gong
INTRODUCTION: This study was performed to evaluate the diagnostic performance of multi-slice CT angiography combined with enterography in determining the cause and location of obstruction as well as intestinal ischaemia in patients with small bowel obstruction (SBO). METHODS: This study retrospectively summarized the image data of 57 SBO patients who received both multi-slice CT angiography and enterography examination between December 2012 and May 2013. The CT diagnoses of SBO and intestinal ischaemia were correlated with the findings at surgery or digital subtraction angiography, which were set as standard references...
October 5, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27709803/inter-scan-and-inter-observer-tumour-volume-delineation-variability-on-cone-beam-computed-tomography-in-patients-treated-with-stereotactic-body-radiation-therapy-for-early-stage-non-small-cell-lung-cancer
#20
Ying Hou, Stephanie Lee, Vishesh Agrawal, John Romano, Elizabeth H Baldini, Aileen B Chen, David E Kozono, Joseph H Killoran, Matthew Wagar, Fred L Hacker, Hugo Jwl Aerts, John H Lewis, Raymond H Mak
INTRODUCTION: Quantification of volume changes on cone beam computed tomography (CBCT) during lung stereotactic body radiation therapy (SBRT) for non-small cell lung cancer (NSCLC) may provide a useful radiological marker for radiation response and for adaptive treatment planning. This study quantifies inter-scan and inter-observer variability in tumour volume delineation on CBCT. METHODS: Three clinicians independently contoured the primary gross tumour volume (GTV) manually on CBCTs taken immediately before SBRT treatment (pre) and after the same SBRT treatment (post) for 19 NSCLC patients...
October 5, 2016: Journal of Medical Imaging and Radiation Oncology
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