Ionizing Radiation Detectors for Medical Imaging [Book Review

2006 ◽  
Vol 25 (4) ◽  
pp. 10-10
Author(s):  
G. Madhavan
Keyword(s):  
Medical Imaging ◽  
Ionizing Radiation ◽  
Radiation Detectors

How much is the effective dose from medical imaging in pediatric patients in the neurosurgery department?

2021 ◽  
Author(s):  
B. Zeinali-Rafsanjani ◽  
S. Haseli ◽  
R. Jalli ◽  
M. Saeedi-Moghadam
Keyword(s):  
Medical Imaging ◽  
Ionizing Radiation ◽  
Ct Scan ◽  
Effective Dose ◽  
Pediatric Patients ◽  
Ct Scans ◽  
Imaging Data ◽  
Plain Radiographs ◽  
Brain Ct ◽  
Abdomen Ct

Medical imaging with ionizing radiation in pediatric patients is rising, and their radiation sensitivity is 2–3 times more than adults. The objective of this study was to estimate the total effective dose (ED) of all medical imaging by CT scan and plain radiography in patients in pediatric neurosurgery department. Patients with at least one brain CT scan and recorded dose length product (DLP) were included. Patients’ imaging data were collected from the picture-archiving-and-communicating system (PACS) using their national code to find all their medical imaging. Total ED (mSv) from CT scans and plain radiographs were calculated. A total of 300 patients were included, of which 129 were females and 171 males with a mean age of 5.45 ± 4.34 years. Mean DLPs of brain, abdomen, and chest CT were 329.16, 393.06, 284.46 mGy.cm. The most frequent CT scans in these children were brain CT scans with ED range of 0.09 to 47.09 mSv. Total ED due to all CT scans and plain radiographs were in the range of 0.38 to 63.41 mSv. Although the mean DLP of each brain, chest, and abdomen CT of patients was in the range of DRLs reported by previous studies, the patients with numerous CT scans received more radiation doses than mean ED (6.21 mSv between all age groups). The most frequent CT scan was the brain, and the most frequent plain radiographs were chest and lower extremities. It can be concluded that reducing the number of CT scans or plain radiographs by appropriate physical exams or replacing them with modalities that do not use ionizing radiation can reduce ED.

Comparative Studies of Ionizing Radiation Detectors Made on the Basis of Various Types of Diamond Plates

2021 ◽  
Vol 23 (2) ◽  
pp. 68-75
Author(s):  
Altukhov A.A. ◽  
Keyword(s):  
Ionizing Radiation ◽  
Single Crystal ◽  
Comparative Studies ◽  
Collection Efficiency ◽  
Radiation Detectors ◽  
Charge Collection ◽  
Alpha Radiation ◽  
Charge Collection Efficiency ◽  
Polarization Phenomena

The results of experiments on the study of polarization phenomena and the charge collection efficiency in test structures of diamond ionizing radiation detectors using diamond plates of various types, including single-crystal NRNT-type, single-crystal CVD-type, as well as polycrystalline type, when exposed to alpha-radiation with an energy of 5.5 MeV are presented. Studies have demonstrated the existence of a number of problems with the device quality of diamond plates that affect the performance of spec-trometric-type detectors.

Entropy as a measure of the performance of phosphor materials used in medical imaging radiation detectors

2001 ◽  
Vol 72 (1) ◽  
pp. 67-72 ◽  
Author(s):  
D. Cavouras ◽  
I. Kandarakis ◽  
T. Maris ◽  
G.S. Panayiotakis ◽  
C.D. Nomicos
Keyword(s):  
Medical Imaging ◽  
Radiation Detectors ◽  
Materials Used

Ionizing radiation detectors based on radiation-stable crystalline semiconductors of the In2Te3 type

1977 ◽  
Vol 42 (4) ◽  
pp. 321-325 ◽  
Author(s):  
V. M. Koshkin ◽  
L. P. Gal'chinetskii ◽  
V. N. Kulik ◽  
G. K. Gusev ◽  
U. A. Ulmanis
Keyword(s):  
Ionizing Radiation ◽  
Radiation Detectors

Operational Characteristics of SiC Diodes as Ionizing Radiation Detectors

2009 ◽  
Author(s):  
M. De Napoli ◽  
F. Giacoppo ◽  
G. Raciti ◽  
E. Rapisarda ◽  
C. Sfienti ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Radiation Detectors ◽  
Operational Characteristics
Sign in / Sign up

Export Citation Format

Share Document