Diffusion-weighted whole-body imaging with background body signal suppression/T2 image fusion and positron emission tomography/computed tomography of upper gastrointestinal cancers

2015 ◽  
Vol 40 (8) ◽  
pp. 3012-3019 ◽  
Author(s):  
Minoru Tomizawa ◽  
Fuminobu Shinozaki ◽  
Yoshitaka Uchida ◽  
Katsuhiro Uchiyama ◽  
Kazunori Fugo ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Emission Tomography ◽  
Whole Body ◽  
Whole Body Imaging ◽  
Gastrointestinal Cancers ◽  
Body Imaging ◽  
Positron Emission ◽  
Signal Suppression ◽  
Upper Gastrointestinal

scholarly journals Diffusion-weighted whole-body imaging with background body signal suppression/T2-weighted image fusion of gastrointestinal cancers

2016 ◽  
Vol 5 (1) ◽  
pp. 44-48 ◽  
Author(s):  
MINORU TOMIZAWA ◽  
FUMINOBU SHINOZAKI ◽  
KAZUNORI FUGO ◽  
TAKAFUMI SUNAOSHI ◽  
DAISUKE KANO ◽  
...  
Keyword(s):  
Image Fusion ◽  
Whole Body ◽  
Whole Body Imaging ◽  
Gastrointestinal Cancers ◽  
Body Imaging ◽  
Weighted Image ◽  
Diffusion Weighted ◽  
Signal Suppression

POSITRON EMISSION TOMOGRAPHY WITH 18F -FDG IN THE DIAGNOSIS OF PROSTHETIC HEART VALVE ENDOCARDITIS

2021 ◽  
Vol 5 (1) ◽  
pp. 1151-1160
Author(s):  
A.S. Lukashevich ◽  
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Fdg Pet ◽  
Prosthetic Heart Valve ◽  
Emission Tomography ◽  
Whole Body ◽  
Positron Emission ◽  
Pet Ct ◽  
18F Fdg ◽  
Fdg Pet Ct

Purpose. The purpose of the article is to evaluate the diagnostic significance of positron emission tomography / computed tomography with 18F -fluorodeoxyglucose (18F -FDG PET/CT) for the diagnosis of prosthetic endocarditis. Methods of research. The study included 82 patients with suspected prosthetic endocarditis in accordance with the criteria proposed by Duke University [1-5]. The patients received hospital treatment at the State Institution RSPC "Cardiology" from January 2016 to March 2021. The study was of a prospective, non-randomized, single-center cohort design. The duration of the monitor period was 12 months from the moment of patients’ inclusion in the study. Whole-body positron emission tomography / computed tomography (PET/CT) examinations were performed in 82 patients. 27 patients were selected for surgical treatment. Conservative treatment group included 16 patients. 27 patients were selected into the observation group, they were suspected to have prosthetic heart valve infection in the primary referral and underwent PET/CT scanning, according to which the diagnosis of prosthetic endocarditis was excluded. The event under the study did not develop in this group during the year of observation. Results and conclusion. The history of infective endocarditis was not statistically significant and did not increase the risk of developing prosthetic endocarditis in the sample presented. The Duke criteria are less reliable in establishing the diagnosis of prosthetic endocarditis. The median number of days from the date of the first prosthesis implantation to the onset of prosthetic endocarditis was about 4 years. This study revealed that the development of the infectious process in the area of the prosthesis was noted in a more distant postoperative period compared to literature data. Histological confirmation of infection was noted in 100% (27 patients) of cases in reoperated patients. The presence of a more formidable complication such as valve ring abscess located mainly in the projection of the aortic valve ring was quite common in both groups. Presepsin and Interleukin-6 have a statistically significant (U = 394,50 p = 0,01 and U = 94,50 p = 0.004) value in the prognosis of prosthetic endocarditis. Considering the data obtained from ROC analysis, it can be said that the cut-off point at which it is possible to diagnose prosthetic endocarditis based on PETCT is 2.85. The presented methods for the interpretation of whole-body FDG-PET/CT images of patients with suspected infectious complications after cardiac surgery, as well as with the presence of prosthetic endocarditis, show high sensitivity and specificity.

scholarly journals Exposure Doses to Technologists Working in 7 PET/CT Departments

Dose-Response ◽  
2020 ◽  
Vol 18 (3) ◽  
pp. 155932582093828
Author(s):  
Weiguo Li ◽  
Lianying Fang ◽  
Jieqing Li
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Occupational Exposure ◽  
Emission Tomography ◽  
Whole Body ◽  
Average Dose ◽  
Protective Measures ◽  
Positron Emission ◽  
Pet Ct ◽  
Main Population

Objective: The aim of this study was to measure occupational exposure doses of technologists who dispense and inject radiopharmaceuticals in 7 positron emission tomography/computed tomography (PET/CT) departments. This was done with the goal to help improving protective designs in PET departments and/or establishing national protection standards. Method: Common LiF thermoluminescence dosimeters (TLDs) were placed on the chest and necklace of the technologists to monitor whole-body and thyroid doses, respectively. Ring TLDs were also worn on both index fingers to measure individual hand doses. All TLDs were assembled and measured once every 3 months for a total of 12 months. Additionally, we measured and compared the dose of TLDs attached to both the inside and the outside of the technologist’s lead coat. Results: Technologists received relatively high exposures, which accounted for 64% to 94% of the collective dose in their respective departments. Their thyroid doses ranged from 1.2 to 1.7 mSv/a; some technologists’ hand doses exceeded 500 mSv/a. Use of a lead coat reduced the average dose by 8%. Conclusion: Technologists working in PET/CT departments were the main population exposed to radiation. This work underscores the need for enhanced protective measures for these workers to better reduce their exposure, particularly for their hands.

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