Characterisation of grids of point detectors in maximum skin dose measurement in fluoroscopically-guided interventional procedures
Research output: Contribution to journal › Article
Standard
Characterisation of grids of point detectors in maximum skin dose measurement in fluoroscopically-guided interventional procedures. / Dabin, Jérémie; Negri, Anna; Farah, Jad; Struelens, Lara (Peer reviewer); Ciraj-Bjelac, Olivera; Clairand, Isabelle; De Angelis, Cinzia; Domienik, Joanna; Jarvinen, Hannu; Kopec, Renata; Majer, Marija; Malchair, Françoise; Novak, Leos; Siiskonen, Teemu; Vanhavere, Filip; Trianni, Annalisa; Knezevic, Zeljka.
In: Physica Medica, Vol. 31, No. 8, 12.2015, p. 1112.Research output: Contribution to journal › Article
Harvard
APA
Vancouver
Author
Bibtex - Download
}
RIS - Download
TY - JOUR
T1 - Characterisation of grids of point detectors in maximum skin dose measurement in fluoroscopically-guided interventional procedures
AU - Dabin, Jérémie
AU - Negri, Anna
AU - Farah, Jad
AU - Ciraj-Bjelac, Olivera
AU - Clairand, Isabelle
AU - De Angelis, Cinzia
AU - Domienik, Joanna
AU - Jarvinen, Hannu
AU - Kopec, Renata
AU - Majer, Marija
AU - Malchair, Françoise
AU - Novak, Leos
AU - Siiskonen, Teemu
AU - Vanhavere, Filip
AU - Trianni, Annalisa
AU - Knezevic, Zeljka
A2 - Struelens, Lara
N1 - Score=10
PY - 2015/12
Y1 - 2015/12
N2 - Purpose: Point detectors are frequently used to measure patient's maximum skin dose (MSD) in fluoroscopically-guided interventional procedures (IP). However, their performance and ability to detect the actual MSD are rarely evaluated. The present study investigates the sampling uncertainty associated with the use of grids of point detectors to measure MSD in IP.Method: Chemoembolisation of the liver (CE), percutaneous coronary intervention (PCI) and neuroembolisation (NE) procedures were studied. Spatial dose distributions were measured with XR-RV3 Gafchromic (R) films for 176 procedures. These distributions were used to simulate measurements performed using grids of detectors such as thermoluminescence detectors, with detector spacing from 1.4 up to 10 cm.Results: The sampling uncertainty was the highest in PCI and NE procedures. With 40 detectors covering the film area (36 cm x 44 cm), the maximum dose would be on average 86% and 63% of the MSD measured with Gafchromic (R) films in CE and PCI procedures, respectively. In NE procedures, with 27 detectors covering the film area (14 cm x 35 cm), the maximum dose measured would be on average 82% of the MSD obtained with the Gafchromic (R) films.Conclusion: Thermoluminescence detectors show good energy and dose response in clinical beam qualities. However the poor spatial resolution of such point-like dosimeters may far outweigh their good dosimetric properties. The uncertainty from the sampling procedure should be estimated when point detectors are used in IP because it may lead to strong underestimation of the MSD.
AB - Purpose: Point detectors are frequently used to measure patient's maximum skin dose (MSD) in fluoroscopically-guided interventional procedures (IP). However, their performance and ability to detect the actual MSD are rarely evaluated. The present study investigates the sampling uncertainty associated with the use of grids of point detectors to measure MSD in IP.Method: Chemoembolisation of the liver (CE), percutaneous coronary intervention (PCI) and neuroembolisation (NE) procedures were studied. Spatial dose distributions were measured with XR-RV3 Gafchromic (R) films for 176 procedures. These distributions were used to simulate measurements performed using grids of detectors such as thermoluminescence detectors, with detector spacing from 1.4 up to 10 cm.Results: The sampling uncertainty was the highest in PCI and NE procedures. With 40 detectors covering the film area (36 cm x 44 cm), the maximum dose would be on average 86% and 63% of the MSD measured with Gafchromic (R) films in CE and PCI procedures, respectively. In NE procedures, with 27 detectors covering the film area (14 cm x 35 cm), the maximum dose measured would be on average 82% of the MSD obtained with the Gafchromic (R) films.Conclusion: Thermoluminescence detectors show good energy and dose response in clinical beam qualities. However the poor spatial resolution of such point-like dosimeters may far outweigh their good dosimetric properties. The uncertainty from the sampling procedure should be estimated when point detectors are used in IP because it may lead to strong underestimation of the MSD.
KW - Fluoroscopically-guided procedures
KW - TLD
KW - Sampling uncertainty
KW - Point detectors
KW - Maximum skin dose
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/9269778
U2 - 10.1016/j.ejmp.2015.08.006
DO - 10.1016/j.ejmp.2015.08.006
M3 - Article
VL - 31
SP - 1112
JO - Physica Medica
JF - Physica Medica
SN - 1120-1797
IS - 8
ER -
ID: 854868