keyword
MENU ▼
Read by QxMD icon Read
search

Whole body scan

keyword
https://www.readbyqxmd.com/read/28437010/technical-note-comparison-of-peripheral-patient-dose-from-mr-guided-60-co-therapy-and-6mv-linear-accelerator-igrt
#1
Pascal Hauri, Roger A Hälg, Uwe Schneider
PURPOSE: The use of X-ray imaging in radiation therapy can give a substantial dose to the patient. A Cobalt machine combined with an magnetic resonance imaging (MRI) was recently introduced to clinical work. One positive aspect of using non-ionizing imaging devices is the reduction of the patient exposure. The purpose of this study was to quantify the difference in out-of-field dose to the patient between the image guided radiation therapy (IGRT) treatment applied with a linear accelerator with cone beam CT (CBCT) equipment and a Cobalt machine combined with an MRI...
April 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28430616/evaluation-of-pituitary-uptake-incidentally-identified-on-18f-fdg-pet-ct-scan
#2
Huijun Ju, Jinxin Zhou, Yu Pan, Jing Lv, Yifan Zhang
The clinical significance of pituitary uptake on routine whole body 18F-fluorodeoxyglucose (FDG) positron emission tomography/computer tomography (PET/CT) is not completely characterized. We seek to assess the potential differential diagnosis/underlying etiology of pituitary FDG uptake incidentally identified on routine PET/CT scans. A total of 24,007 PET/CT whole body scans in recent 5 years were retrospectively reviewed. Patients with maximum standardized uptake value (SUVmax) > 4.1 in the pituitary glands were identified...
February 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28428468/multicenter-investigation-of-the-effective-dose-for-whole-body-ct-scanning
#3
Toshimitsu Sato, Yukihiro Saito, Nobutoshi Saito, Makoto Ooba
OBJECTIVE: To study whether the actual radiation exposure is different between computed tomography (CT) scanners and medical centers when the same patient is scanned, we investigated the actual effective doses for a whole body (Chest-Pelvis) CT scan in a multicenter study. MATERIALS AND METHODS: Data from subjects were collected using 12 CT scanners at six medical centers in Yamagata city. Effective-dose data were acquired by scanning the same phantom (ATOM Dosimetry Phantoms Model702-B) using 120 kV tube voltage...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28423041/modeling-the-shape-and-composition-of-the-human-body-using-dual-energy-x-ray-absorptiometry-images
#4
John A Shepherd, Bennett K Ng, Bo Fan, Ann V Schwartz, Peggy Cawthon, Steven R Cummings, Stephen Kritchevsky, Michael Nevitt, Adam Santanasto, Timothy F Cootes
There is growing evidence that body shape and regional body composition are strong indicators of metabolic health. The purpose of this study was to develop statistical models that accurately describe holistic body shape, thickness, and leanness. We hypothesized that there are unique body shape features that are predictive of mortality beyond standard clinical measures. We developed algorithms to process whole-body dual-energy X-ray absorptiometry (DXA) scans into body thickness and leanness images. We performed statistical appearance modeling (SAM) and principal component analysis (PCA) to efficiently encode the variance of body shape, leanness, and thickness across sample of 400 older Americans from the Health ABC study...
2017: PloS One
https://www.readbyqxmd.com/read/28422888/18f-fdg-pet-ct-for-detection-of-the-primary-tumor-in-adults-with-extracervical-metastases-from-cancer-of-unknown-primary-a-systematic-review-and-meta-analysis
#5
Synne Alexandra Burglin, Søren Hess, Poul Flemming Høilund-Carlsen, Oke Gerke
BACKGROUND: Cancer of unknown primary (CUP) is a heterogeneous group of cancers, so called when a biopsy from a patient reveals malignancy without giving a clue to where in the body the primary tumor is located. Whole-body 18-fluorine-fluorodeoxyglucose positron-emission-tomography/computed tomography (18F-FDG PET/CT) is widely used for diagnosis and staging of most cancers. We hypothesized that 18F-FDG PET/CT-especially if used early-is suitable for the detection of the primary tumor in patients with CUP...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28417857/nuclear-medicine-imaging-in-pediatric-infection-or-chronic-inflammatory-diseases
#6
REVIEW
Alberto Signore, Andor W J M Glaudemans, Olivier Gheysens, Chiara Lauri, Onofrio A Catalano
In this review article, we focus on the most recent applications of nuclear medicine techniques (mainly (99m)Tc/(111)In white blood cells (WBC) scan, [(18)F]-FDG-PET/CT, [(18)F]-FDG-PET/MRI, and (99m)Tc-IL-2 scintigraphy) in the study of children affected by peripheral bone osteomyelitis, fungal infections, inflammatory bowel diseases, and type 1 diabetes, owing to recent important published evidences of their role in the management of these diseases. For osteomyelitis in children, both bone scintigraphy and [(18)F]-FDG-PET have a major advantage of assessing the whole body in one imaging session to confirm or exclude multifocal involvement, whereas WBC scan has a limited role...
May 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28417160/diagnosis-of-recurrent-prostate-cancer-with-pet-ct-imaging-using-the-gastrin-releasing-peptide-receptor-antagonist-68-ga-rm2-preliminary-results-in-patients-with-negative-or-inconclusive-18-f-fluoroethylcholine-pet-ct
#7
Gesche Wieser, Ilinca Popp, H Christian Rischke, Vanessa Drendel, Anca-Ligia Grosu, Mark Bartholomä, Wolfgang A Weber, Rosalba Mansi, Ulrich Wetterauer, Wolfgang Schultze-Seemann, Philipp T Meyer, Cordula Annette Jilg
PURPOSE/BACKGROUND: [(18)F]fluoroethylcholine ((18)FECH) has been shown to be a valuable PET-tracer in recurrent prostate cancer (PCa), but still has limited accuracy. RM2 is a gastrin-releasing peptide receptor (GRPr) antagonist that binds to GRPr on PCa cells. Recent studies suggest that GRPr imaging with PET/CT is a promising technique for staging and restaging of PCa. We explore the value of GRPr-PET using the (68)Ga-labeled GRPr antagonist RM2 in a selected population of patients with biochemically recurrent PCa and a negative/inconclusive (18)FECH-PET/CT...
April 18, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28415940/thymoma-metastatic-to-liver-and-pancreas-case-report-and-review-of-the-literature
#8
Nicola Passuello, Gioia Pozza, Stella Blandamura, Michele Valmasoni, Cosimo Sperti
A 71-year-old man presented with a thymic mass involving the superior vena cava. A mediastinoscopical biopsy initially suggested a diagnosis of type A thymoma. After neoadjuvant chemotherapy, the patient underwent en-bloc thymectomy and vascular resection for a pathology-confirmed type B3 thymoma involving the superior vena cava, the left brachiocephalic vein and the distal part of the right brachiocephalic vein. Adjuvant radiotherapy was administered. Two years after the primary surgery, abdominal computed tomography (CT) and whole body fluorodeoxyglucose (18-FDG) positron emission tomography (PET) scans showed a single hepatic lesion that was treated with wedge liver resection...
April 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28408701/low-grade-mucoepidermoid-tumor-of-parotid-gland-presenting-as-focal-asymmetry-in-the-follow-up-radioiodine-scan-in-a-patient-of-differentiated-papillary-carcinoma-of-thyroid
#9
Chinna Naik, Sandip Basu
Low grade mucoepidermoid tumor of the right parotid gland presenting as focal uptake in the follow-up whole body iodine scan in a patient of differentiated papillary carcinoma of thyroid 1 year after successful ablation is presented in this report. Following surgical excision, the histopathology was proven. The illustrated case represents false positive focal accumulation of (131)I in low grade mucoepidermoid carcinoma of the salivary gland that arose early in the follow-up course in differentiated thyroid carcinoma post-radioiodine (RAI)...
April 13, 2017: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/28401794/chinese-data-of-efficacy-of-low-and-high-dose-of-iodine-131-for-the-ablation-of-thyroid-remnant
#10
Chao Ma, Fang Feng, Shaoyan Wang, Hongliang Fu, Shuqi Wu, Zhiyi Ye, Suyun Chen, Hui Wang
BACKGROUND: Chinese data of efficacy of low- and high-dose of radioiodine for thyroid remnant is still absent. The aim of the study is to investigate whether the low-dose of radioiodine is as effective as high-dose for remnant ablation in Chinese patients. METHODS: Patients presenting for radioiodine ablation in our department were included. Inclusion criteria were an age of 16 years or older; total or near total thyroidectomy; tumor-node-metastasis (TNM) stage of pT1-3, any N stage and M0...
April 12, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28401173/history-and-future-technical-innovation-in-positron-emission-tomography
#11
REVIEW
Terry Jones, David Townsend
Instrumentation for positron emission tomography (PET) imaging has experienced tremendous improvements in performance over the past 60 years since it was first conceived as a medical imaging modality. Spatial resolution has improved by a factor of 10 and sensitivity by a factor of 40 from the early designs in the 1970s to the high-performance scanners of today. Multimodality configurations have emerged that combine PET with computed tomography (CT) and, more recently, with MR. Whole-body scans for clinical purposes can now be acquired in under 10 min on a state-of-the-art PET/CT...
January 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28394842/struma-ovarii-with-hyperthyroidism
#12
Lynn P Ang, Anca M Avram, Richard W Lieberman, Nazanene H Esfandiari
We report the case of a 61-year-old woman with persistent thyrotoxicosis for 7 years despite low thyroidal radioiodine uptake and methimazole treatment. Her initial I whole-body scan (WBS) was read as negative. Upon evaluation in our institution, she remained hyperthyroid after discontinuation of methimazole. Repeat WBS with SPECT/CT revealed low 24-hour thyroidal uptake (RAIU = 2%) and intensely focal radioiodine uptake in a large heterogeneous left pelvic mass, consistent with left adnexal struma ovarii. Resection of this mass confirmed benign struma ovarii...
April 7, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28394818/optimization-of-pet-ct-image-quality-using-the-ge-sharp-ir-point-spread-function-reconstruction-algorithm
#13
Nicholas J Vennart, Nicholas Bird, John Buscombe, Heok K Cheow, Ewa Nowosinska, Sarah Heard
OBJECTIVE: The objective of this study was to quantify any improvement with the GE 'Sharp IR' point-spread function (PSF) reconstruction algorithm in addition to ordered subsets expectation maximum (OSEM) and time-of-flight (TOF) reconstruction algorithms and establish the optimum parameters to be used in clinical studies. MATERIALS AND METHODS: We conducted a range of experiments using the National Electrical Manufacturers Association image quality phantom filled with a 4 : 1 signal-to-background ratio...
April 7, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28392615/ultra-high-spatial-resolution-multi-energy-ct-using-photon-counting-detector-technology
#14
S Leng, R Gutjahr, A Ferrero, S Kappler, A Henning, A Halaweish, W Zhou, J Montoya, C McCollough
Two ultra-high-resolution (UHR) imaging modes, each with two energy thresholds, were implemented on a research, whole-body photon-counting-detector (PCD) CT scanner, referred to as sharp and UHR, respectively. The UHR mode has a pixel size of 0.25 mm at iso-center for both energy thresholds, with a collimation of 32 × 0.25 mm. The sharp mode has a 0.25 mm pixel for the low-energy threshold and 0.5 mm for the high-energy threshold, with a collimation of 48 × 0.25 mm. Kidney stones with mixed mineral composition and lung nodules with different shapes were scanned using both modes, and with the standard imaging mode, referred to as macro mode (0...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28392613/lung-nodule-volume-quantification-and-shape-differentiation-with-an-ultra-high-resolution-technique-on-a-photon-counting-detector-ct-system
#15
W Zhou, J Montoya, R Gutjahr, A Ferrero, A Halaweish, S Kappler, C McCollough, S Leng
A new ultra high-resolution (UHR) mode has been implemented on a whole body photon counting-detector (PCD) CT system. The UHR mode has a pixel size of 0.25 mm by 0.25 mm at the iso-center, while the conventional (macro) mode is limited to 0.5 mm by 0.5 mm. A set of synthetic lung nodules (two shapes, five sizes, and two radio-densities) was scanned using both the UHR and macro modes and reconstructed with 2 reconstruction kernels (4 sets of images in total). Linear regression analysis was performed to compare measured nodule volumes from CT images to reference volumes...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28390146/abdominal-obesity-and-white-matter-microstructure-in-midlife
#16
Alex Cole Birdsill, Stephanie Oleson, Sonya Kaur, Evan Pasha, Adele Ireton, Hirofumi Tanaka, Andreana Haley
The aging U.S. population and the recent rise in the prevalence of obesity are two phenomena of great importance to public health. In addition, research suggests that midlife body mass index (BMI) is a risk factor for dementia, a particularly costly disease, in later life. BMI could influence brain health by adversely impacting cerebral white matter. Recently, greater BMI has been associated with lower white matter fractional anisotropy (FA), an index of tissue microstructure, as measured by diffusion-tensor imaging in midlife...
April 8, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28388669/reference-standards-for-body-fat-measures-using-ge-dual-energy-x-ray-absorptiometry-in-caucasian-adults
#17
Mary T Imboden, Whitney A Welch, Ann M Swartz, Alexander H K Montoye, Holmes W Finch, Matthew P Harber, Leonard A Kaminsky
BACKGROUND: Dual energy x-ray absorptiometry (DXA) is an established technique for the measurement of body composition. Reference values for these variables, particularly those related to fat mass, are necessary for interpretation and accurate classification of those at risk for obesity-related health complications and in need of lifestyle modifications (diet, physical activity, etc.). Currently, there are no reference values available for GE-Healthcare DXA systems and it is known that whole-body and regional fat mass measures differ by DXA manufacturer...
2017: PloS One
https://www.readbyqxmd.com/read/28387789/evolution-of-wood-anatomical-characters-in-nepenthes-and-close-relatives-of-caryophyllales
#18
Rachel Schwallier, Barbara Gravendeel, Hugo de Boer, Stephan Nylinder, Bertie Joan van Heuven, Anton Sieder, Sukaibin Sumail, Rogier van Vugt, Frederic Lens
Background and Aims: Nepenthes attracts wide attention with its spectacularly shaped carnivorous pitchers, cultural value and horticultural curiosity. Despite the plant's iconic fascination, surprisingly little anatomical detail is known about the genus beyond its modified leaf tip traps. Here, the wood anatomical diversity of Nepenthes is explored. This diversity is further assessed with a phylogenetic framework to investigate whether the wood characters within the genus are relevant from an evolutionary or ecological perspective, or rather depend on differences in developmental stages, growth habits, substrates or precipitation...
April 6, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28386277/thyroid-related-protein-expression-in-the-human-thymus
#19
Mi Jeong Kim, So Won Oh, Hyewon Youn, Juri Na, Keon Wook Kang, Do Joon Park, Young Joo Park, Ja June Jang, Kyu Eun Lee, Kyeong Cheon Jung, June-Key Chung
Radioiodine whole body scan (WBS), related to sodium iodide symporter (NIS) function, is widely used to detect recurrence/metastasis in postoperative patients with thyroid cancer. However, the normal thymic uptake of radioiodine has occasionally been observed in young patients. We evaluated the expression of thyroid-related genes and proteins in the human thymus. Thymic tissues were obtained from 22 patients with thyroid cancer patients of all ages. The expression of NIS, thyroid-stimulating hormone receptor (TSHR), thyroperoxidase (TPO), and thyroglobulin (Tg) was investigated using immunohistochemistry and quantitative RT-PCR...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/28385795/-18-f-tetrafluoroborate-18-f-tfb-a-pet-probe-for-imaging-sodium-iodide-symporter-expression-whole-body-biodistribution-safety-and-radiation-dosimetry-in-thyroid-cancer-patients
#20
Jim O' Doherty, Maite Jauregui-Osoro, Teresa Brothwood, Teresa Szyszko, Paul Marsden, Michael O' Doherty, Gary Cook, Philip Blower, Val Lewington
Rationale: We report the safety, biodistribution and internal radiation dosimetry, in humans with thyroid cancer, of (18)F-tetrafluoroborate ((18)F-TFB), a novel PET radioligand for imaging the human sodium/iodide symporter (hNIS). Methods: Serial whole-body PET scans of 5 subjects with recently diagnosed with thyroid cancer were acquired prior to surgery for up to 4 hours after injection of 184 ± 15 MBq of (18)F-TFB. Activity was determined in whole blood, plasma and urine. Mean organ absorbed doses and effective doses were calculated via quantitative image analysis and using OLINDA/EXM software...
April 6, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
keyword
keyword
76858
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"