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https://www.readbyqxmd.com/read/28651263/quality-and-dose-optimized-ct-trauma-protocol-recommendation-from-a-university-level-i-trauma-center
#1
Johannes Kahn, David Kaul, Georg Böning, Roman Rotzinger, Patrick Freyhardt, Philipp Schwabe, Martin H Maurer, Diane Miriam Renz, Florian Streitparth
Purpose As a supra-regional level-I trauma center, we evaluated computed tomography (CT) acquisitions of polytraumatized patients for quality and dose optimization purposes. Adapted statistical iterative reconstruction [(AS)IR] levels, tube voltage reduction as well as a split-bolus contrast agent (CA) protocol were applied. Materials and Methods 61 patients were split into 3 different groups that differed with respect to tube voltage (120 - 140 kVp) and level of applied ASIR reconstruction (ASIR 20 - 50 %)...
June 26, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28648984/whole-body-biodistribution-of-the-cannabinoid-type-1-receptor-ligand-18-f-mk-9470-in-the-rat
#2
H G Buchholz, K Uebbing, S Maus, S Pektor, N Afahaene, V Weyer-Elberich, B Lutz, M Schreckenberger, I Miederer
The endocannabinoid system participates in many processes in the body, including memory, reward, pain, motor activity, food intake, energy metabolism, and gastrointestinal functions. [(18)F]MK-9470 is a positron emission tomography (PET) ligand that binds with high affinity and selectivity to the cannabinoid type 1 receptor. In order to fully characterize ligand behavior, tracer uptake measured using in vivo microPET was compared with results from ex vivo tissue dissection. Twelve male Sprague-Dawley rats were divided into three subgroups and scanned over time periods of 10min, 30min and 90min using PET...
June 15, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28645684/detection-and-quantification-of-223-ra-uptake-in-bone-metastases-of-patients-with-castration-resistant-prostate-carcinoma-with-the-aim-of-determining-the-absorbed-dose-in-the-metastases
#3
P Mínguez, A Gómez de Iturriaga, I L Fernández, E Rodeño
PURPOSES: To obtain the necessary acquisition and calibration parameters in order to evaluate the possibility of detecting and quantifying (223)Ra uptake in bone metastases of patients treated for castration resistant prostate carcinoma. Furthermore, in the cases in which the activity can be quantified, to determine the absorbed dose. MATERIAL AND METHODS: Acquisitions from a Petri dish filled with (223)Ra were performed in the gamma camera. Monte Carlo simulations were also performed to study the partial volume effect...
June 20, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28639707/dressings-and-topical-agents-for-treating-pressure-ulcers
#4
REVIEW
Maggie J Westby, Jo C Dumville, Marta O Soares, Nikki Stubbs, Gill Norman
BACKGROUND: Pressure ulcers, also known as bedsores, decubitus ulcers and pressure injuries, are localised areas of injury to the skin or the underlying tissue, or both. Dressings are widely used to treat pressure ulcers and promote healing, and there are many options to choose from including alginate, hydrocolloid and protease-modulating dressings. Topical agents have also been used as alternatives to dressings in order to promote healing.A clear and current overview of all the evidence is required to facilitate decision-making regarding the use of dressings or topical agents for the treatment of pressure ulcers...
June 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28634585/high-plasma-glucagon-levels-correlate-with-waist-to-hip-ratio-suprailiac-skinfold-thickness-and-deep-subcutaneous-abdominal-and-intraperitoneal-adipose-tissue-depots-in-nonobese-asian-indian-males-with-type-2-diabetes-in-north-india
#5
Shajith Anoop, Anoop Misra, Surya Prakash Bhatt, Seema Gulati, Harsh Mahajan, Gokulraj Prabakaran
We aimed to correlate plasma glucagon levels with anthropometric measures and abdominal adipose tissue depots. Nonobese males (n = 81; BMI < 25 kg/m(2)) with T2DM of less than one-year duration and nonobese males without diabetes (n = 30) were evaluated for the following: anthropometry (BMI, waist circumference, W-HR, and truncal skinfolds), whole-body DEXA (for body fat and fat-free mass), and MRI scan (for volumes of subcutaneous abdominal adipose tissue (SCAT) including superficial and deep, intra-abdominal visceral adipose tissue (including intraperitoneal adipose tissue (IPAT), retroperitoneal adipose tissue, liver span and fatty liver, and pancreatic volume))...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28625749/preclinical-evaluation-of-melanocortin-1-receptor-mc1-r-specific-68-ga-and-44-sc-labeled-dota-napamide-in-melanoma-imaging
#6
Gábor Nagy, Noémi Dénes, Adrienn Kis, Judit P Szabó, Ervin Berényi, Ildikó Garai, Péter Bai, István Hajdu, Dezső Szikra, György Trencsényi
PURPOSE: Alpha melanocyte stimulating hormone (α-MSH) enhances melanogenesis in melanoma malignum by binding to melanocortin-1 receptors (MC1-R). Earlier studies demonstrated that alpha-MSH analog NAPamide molecule specifically binds to MC1-R receptor. Radiolabeled NAPamide is a promising radiotracer for the non-invasive detection of melanin producing melanoma tumors by Positron Emission Tomography (PET). In this present study the MC1-R selectivity of the newly developed Sc-44-labeled DOTA-NAPamide was investigated in vitro and in vivo using melanoma tumors...
June 16, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28624057/surveillance-strategies-in-the-follow-up-of-melanoma-patients-too-much-or-not-enough
#7
James Kurtz, Georgia M Beasley, Doreen Agnese, Kari Kendra, Thomas E Olencki, Alicia Terando, J Harrison Howard
BACKGROUND: After appropriate initial therapy for patients with stage II-III melanoma, there is no consensus regarding surveillance. Thus, follow-up is highly variable among institutions and individual providers. The National Comprehensive Cancer Network recommends routine clinical examination and consideration of imaging for stage IIB-IIIC every 3-12 mo with no distinction between stages. Detection of recurrence is important as novel systemic therapies and surgical resection of recurrence may provide survival benefits...
June 15, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28620714/the-outcome-of-i-131-ablation-therapy-for-intermediate-and-high-risk-differentiated-thyroid-cancer-using-a-strict-definition-of-successful-ablation
#8
Ken Watanabe, Mayuki Uchiyama, Kunihiko Fukuda
PURPOSE: This article examines the outcome of radioactive iodine ablation therapy for thyroid cancer in high-risk patients and investigates background factors influencing ablation failure. MATERIALS AND METHODS: We included 91 patients in this retrospective analysis and evaluated the ablation success rate. Successful ablation was defined as the absence of visible iodine-131 (I-131) accumulation in the thyroid bed after whole-body scans and thyroglobulin levels <2 ng/ml in a TSH-stimulated state after ablation...
June 15, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28617334/the-molecular-effect-of-diagnostic-absorbed-doses-from-131-i-on-papillary-thyroid-cancer-cells-in-vitro
#9
Mariusz Stasiołek, Zbigniew Adamczewski, Przemysław W Śliwka, Bartosz Puła, Bolesław Karwowski, Anna Merecz-Sadowska, Marek Dedecjus, Andrzej Lewiński
Diagnostic whole-body scan is a standard procedure in patients with thyroid cancer prior to the application of a therapeutic dose of (131)I. Unfortunately, administration of the radioisotope in a diagnostic dose may decrease further radioiodine uptake-the phenomenon called "thyroid stunning". We estimated radiation absorbed dose-dependent changes in genetic material, in particular in the sodium iodide symporter (NIS) gene promoter, and the NIS protein level in a K1 cell line derived from the metastasis of a human papillary thyroid carcinoma exposed to (131)I in culture...
June 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28614701/appendicular-and-whole-body-lean-mass-outcomes-are-associated-with-finite-element-analysis-derived-bone-strength-at-the-distal-radius-and-tibia-in-adults-aged-40years-and-older
#10
Jenna C Gibbs, Lora M Giangregorio, Andy K O Wong, Robert G Josse, Angela M Cheung
PURPOSE: The purpose of this cross-sectional study was to determine how appendicular lean mass index (ALMI), and whole body lean (LMI) and fat mass indices (FMI) associate with estimated bone strength outcomes at the distal radius and tibia in adults aged 40 years and older. METHODS: Dual energy X-ray absorptiometry (DXA) scans were performed to determine body composition, including whole body lean and fat mass, and appendicular lean mass. ALMI (appendicular lean mass/height(2)), LMI (lean tissue mass/height(2)) and FMI (fat mass/height(2)) were calculated...
June 11, 2017: Bone
https://www.readbyqxmd.com/read/28613198/lu-177-psma-617-prostate-specific-membrane-antigen-inhibitor-therapy-in-patients-with-castration-resistant-prostate-cancer-stability-bio-distribution-and-dosimetry
#11
Levent Kabasakal, Türkay Toklu, Nami Yeyin, Emre Demirci, Mohammad Abuqbeitah, Meltem Ocak, Aslan Aygün, Emre Karayel, Hüseyin Pehlivanoğlu, Nalan Alan Selçuk
OBJECTIVE: The aim of the study was to estimate the radiation-absorbed doses and to study the in vivo and in vitro stability as well as pharmacokinetic characteristics of lutetium-177 (Lu-177) prostate-specific membrane antigen (PSMA)-617. METHODS: For this purpose, 7 patients who underwent Lu-177-PSMA therapy were included into the study. The injected Lu-177-PSMA-617 activity ranged from 3.6 to 7.4 GBq with a mean of 5.2±1.8 GBq. The stability of radiotracer in saline was calculated up to 48 h...
June 1, 2017: Molecular Imaging and Radionuclide Therapy
https://www.readbyqxmd.com/read/28612079/the-potential-of-223-ra-and-18-f-fluoride-imaging-to-predict-bone-lesion-response-to-treatment-with-223-ra-dichloride-in-castration-resistant-prostate-cancer
#12
Iain Murray, Sarah J Chittenden, Ana M Denis-Bacelar, Cecilia Hindorf, Christopher C Parker, Sue Chua, Glenn D Flux
PURPOSE: The aims of this study were to calculate bone lesion absorbed doses resulting from a weight-based administration of (223)Ra-dichloride, to assess the relationship between those doses and corresponding (18)F-fluoride uptake and to assess the potential of quantitative (18)F-fluoride imaging to predict response to treatment. METHODS: Five patients received two intravenous injections of (223)Ra-dichloride, 6 weeks apart, at 110 kBq/kg whole-body weight. The biodistribution of (223)Ra in metastatic lesions as a function of time after administration as well as associated lesion dosimetry were determined from serial (223)Ra scans...
June 13, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28609109/accuracy-and-radiation-dose-reduction-of-limited-range-ct-in-the-evaluation-of-acute-appendicitis-in-pediatric-patients
#13
Michael Jin, Thomas R Sanchez, Ramit Lamba, Ghaneh Fananapazir, Michael T Corwin
OBJECTIVE: The purpose of this article is to determine the accuracy and radiation dose reduction of limited-range CT prescribed from the top of L2 to the top of the pubic symphysis in children with suspected acute appendicitis. MATERIALS AND METHODS: We performed a retrospective study of 210 consecutive pediatric patients from December 11, 2012, through December 11, 2014, who underwent abdominopelvic CT for suspected acute appendicitis. Two radiologists independently reviewed the theoretic limited scans from the superior L2 vertebral body to the top of the pubic symphysis, to assess for visualization of the appendix, acute appendicitis, alternative diagnoses, and incidental findings...
June 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28596483/skeletal-abnormalities-detected-by-spect-is-associated-with-increased-relapse-risk-in-pediatric-acute-lymphoblastic-leukemia
#14
Fen Zhou, Meiling Zhang, Juan Han, Jinjin Hao, Yan Xiao, Qin Liu, Runming Jin, Heng Mei
OBJECTIVES: Most children with acute lymphoblastic leukemia (ALL) exhibit skeletal abnormalities. This study aimed to investigate bone lesions detected by whole-body bone single-photon emission computed tomography (SPECT) and its prognostic value in children with ALL. METHODS: A retrospective analysis was performed using whole-body bone SPECT scans obtained from children with ALL in our department between June 2008 and June 2012. A total of 166 children newly diagnosed with ALL were included, and the patients were divided into two groups: patients with positive and negative SPECT scans...
May 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28592305/incremental-diagnostic-utility-of-systematic-double-bed-spect-ct-for-bone-scintigraphy-in-initial-staging-of-cancer-patients
#15
Catherine Guezennec, Nathalie Keromnes, Philippe Robin, Ronan Abgral, David Bourhis, Solène Querellou, Romain de Laroche, Alexandra Le Duc-Pennec, Pierre-Yves Salaün, Pierre-Yves Le Roux
BACKGROUND: SPECT/CT has been shown to increase the diagnostic performance of bone scintigraphy for staging of malignancies. A systematic double-bed SPECT/CT of the trunk may allow further improvement. However, this would be balanced by higher dosimetry and longer acquisition time. The objective was to assess the incremental diagnostic utility of a systematic double-bed SPECT/CT acquisition for bone scintigraphy in initial staging of cancer patients, especially compared with the usual approach consisting in a whole body planar scan (WBS) plus one single-bed targeted SPECT/CT...
June 7, 2017: Cancer Imaging: the Official Publication of the International Cancer Imaging Society
https://www.readbyqxmd.com/read/28589253/early-pet-imaging-with-68-ga-psma-11-increases-the-detection-rate-of-local-recurrence-in-prostate-cancer-patients-with-biochemical-recurrence
#16
Christian Uprimny, Alexander Stephan Kroiss, Josef Fritz, Clemens Decristoforo, Dorota Kendler, Elisabeth von Guggenberg, Bernhard Nilica, Johanna Maffey-Steffan, Gianpaolo di Santo, Jasmin Bektic, Wolfgang Horninger, Irene Johanna Virgolini
PURPOSE: PET/CT using (68)Ga-labelled prostate-specific membrane antigen PSMA-11 (HBEDD-CC) has emerged as a promising imaging method in the diagnostic evaluation of prostate cancer (PC) patients with biochemical recurrence. However, assessment of local recurrence (LR) may be limited by intense physiologic tracer accumulation in the urinary bladder on whole-body scans, normally conducted 60 min post-tracer injection (p.i.). It could be shown on early dynamic imaging studies that (68)Ga-PSMA-11 uptake in PC lesions occurs earlier than tracer accumulation in the urinary bladder...
June 6, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28588229/diagnostic-performance-of-18-f-fdg-pet-ct-in-papillary-thyroid-carcinoma-with-negative-131-i-wbs-at-first-postablation-negative-tg-and-progressively-increased-tgab-level
#17
Zhong-Ling Qiu, Wei-Jun Wei, Chen-Tian Shen, Hong-Jun Song, Xin-Yun Zhang, Zhen-Kui Sun, Quan-Yong Luo
Differentiated thyroid cancer (DTC) patients with negative serum thyroglobulin (Tg), negative (131)I whole-body scintigraphy ((131)I-WBS) at first post-ablation and progressively increased TgAb level are a relatively rare entity in the follow-up after total thyroidectomy and radioactive iodine therapy. The value of (18)F-FDG PET/CT in detecting the recurrence of disease in these patients has only been reported in a small case series. The goal of this study was to investigate the diagnostic accuracy of (18)F-FDG PET/CT in detecting recurrent disease in these specific PTC patients and to identify risk factors for patients with positive (18)F-FDG PET/CT results...
June 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28587434/diagnostic-accuracy-of-diffusion-weighted-whole-body-imaging-with-background-body-signal-suppression-t2-weighted-image-fusion-for-the-detection-of-abdominal-solid-cancer
#18
Minoru Tomizawa, Fuminobu Shinozaki, Kazunori Fugo, Satomi Tanaka, Takafumi Sunaoshi, Daisuke Kano, Eriko Sugiyama, Misaki Shite, Ryouta Haga, Yoshiya Fukamizu, Toshiyuki Fujita, Satoshi Kagayama, Rumiko Hasegawa, Akira Togawa, Yoshinori Shirai, Noboru Ichiki, Yuji Oshima, Naoto Koike, Yasuko Toshimitsu, Yasufumi Motoyoshi, Takao Sugiyama, Shigenori Yamamoto, Takashi Kishimoto, Naoki Ishige
Diffusion-weighted whole-body imaging with background body signal suppression (DWIBS) images show significant contrast for cancer tissues against non-cancerous tissues. Fusion of a DWIBS and a T2-weighted image (DWIBS/T2) can be used to obtain functional, as well as anatomic, information. In the present study, the performance of DWIBS/T2 in the diagnosis of abdominal solid cancer was evaluated. The records of 14 patients were retrospectively analyzed [5 patients with hepatocellular carcinoma (HCC), 4 with metastatic liver cancer, 3 with pancreatic cancer, 1 with renal cellular carcinoma and 1 with malignant lymphoma of the para-aortic lymph node]...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28585147/optimal-threshold-of-stimulated-serum-thyroglobulin-level-for-18-f-fdg-pet-ct-imaging-in-patients-with-thyroid-cancer
#19
Hong Chai, Hu Zhang, Yong-Li Yu, Yun-Chao Gao
This study was to explore the optimal threshold of thyroid-stimulating hormone (TSH)-stimulated serum thyroglobulin (s-Tg) for patients who were to receive (18)F-fluorodeoxyglucose ((18)F-FDG) PET/CT scan owing to clinical suspicion of differentiated thyroid cancer (DTC) recurrence but negative post-therapeutic (131)I whole-body scan ((131)I-WBS). A total of 60 qualified patients underwent PET/CT scanning from October 2010 to July 2014. The receiver operating characteristic (ROC) curve analyses showed that s-Tg levels over 49 μg/L led to the highest diagnostic accuracy of PET/CT to detect recurrence, with a sensitivity of 89...
June 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/28583624/higher-breast-cancer-conspicuity-on-dbpet-compared-to-wb-pet-ct
#20
Kayo Nishimatsu, Yuji Nakamoto, Kanae K Miyake, Takayoshi Ishimori, Shotaro Kanao, Masakazu Toi, Kaori Togashi
OBJECTIVES: The purpose of this study was to evaluate lesion detectability of a dedicated breast positron-emission tomography (dbPET) scanner for breast cancers with an updated reconstruction mode, comparing it to whole-body positron-emission tomography/computed tomography (WB-PET/CT). MATERIALS AND METHODS: A total of 179 histologically-proven breast cancer lesions in 150 females who underwent both WB-PET/CT and dbPET with (18)F-fluorodeoxyglucose were retrospectively analyzed...
May 2017: European Journal of Radiology
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