Characterisation of grids of point detectors in maximum skin dose measurement in fluoroscopically-guided interventional procedures

Jérémie Dabin; Anna Negri; Jad Farah; Lara Struelens; Olivera Ciraj-Bjelac; Isabelle Clairand; Cinzia De Angelis; Joanna Domienik; Hannu Jarvinen; Renata Kopec; Marija Majer; Françoise Malchair; Leos Novak; Teemu Siiskonen; Filip Vanhavere; Annalisa Trianni; Zeljka Knezevic

doi:10.1016/j.ejmp.2015.08.006

Characterisation of grids of point detectors in maximum skin dose measurement in fluoroscopically-guided interventional procedures

Jérémie Dabin, Anna Negri, Jad Farah, Lara Struelens, Olivera Ciraj-Bjelac, Isabelle Clairand, Cinzia De Angelis, Joanna Domienik, Hannu Jarvinen, Renata Kopec, Marija Majer, Françoise Malchair, Leos Novak, Teemu Siiskonen, Filip Vanhavere, Annalisa Trianni, Zeljka Knezevic

Research output › peer-review

Abstract

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.

Original language	English
Pages (from-to)	1112
Number of pages	1117
Journal	Physica Medica
Volume	31
Issue number	8
DOIs	https://doi.org/10.1016/j.ejmp.2015.08.006
State	Published - Dec 2015

Access to Document

10.1016/j.ejmp.2015.08.006

Cite this

Dabin, J., Negri, A., Farah, J., Struelens, L., Ciraj-Bjelac, O., Clairand, I., De Angelis, C., Domienik, J., Jarvinen, H., Kopec, R., Majer, M., Malchair, F., Novak, L., Siiskonen, T., Vanhavere, F., Trianni, A., & Knezevic, Z. (2015). Characterisation of grids of point detectors in maximum skin dose measurement in fluoroscopically-guided interventional procedures. Physica Medica, 31(8), 1112. https://doi.org/10.1016/j.ejmp.2015.08.006

@article{60b4432e7f744260a38f219e5849db2d,

title = "Characterisation of grids of point detectors in maximum skin dose measurement in fluoroscopically-guided interventional procedures",

abstract = "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.",

keywords = "Fluoroscopically-guided procedures, TLD, Sampling uncertainty , Point detectors , Maximum skin dose ",

author = "J{\'e}r{\'e}mie Dabin and Anna Negri and Jad Farah and Lara Struelens and Olivera Ciraj-Bjelac and Isabelle Clairand and {De Angelis}, Cinzia and Joanna Domienik and Hannu Jarvinen and Renata Kopec and Marija Majer and Fran{\c c}oise Malchair and Leos Novak and Teemu Siiskonen and Filip Vanhavere and Annalisa Trianni and Zeljka Knezevic",

note = "Score=10",

year = "2015",

month = dec,

doi = "10.1016/j.ejmp.2015.08.006",

language = "English",

volume = "31",

pages = "1112",

journal = "Physica Medica",

issn = "1120-1797",

publisher = "Associazione Italiana di Fisica Medica",

number = "8",

}

Dabin, J, Negri, A, Farah, J, Struelens, L, Ciraj-Bjelac, O, Clairand, I, De Angelis, C, Domienik, J, Jarvinen, H, Kopec, R, Majer, M, Malchair, F, Novak, L, Siiskonen, T, Vanhavere, F, Trianni, A & Knezevic, Z 2015, 'Characterisation of grids of point detectors in maximum skin dose measurement in fluoroscopically-guided interventional procedures', Physica Medica, vol. 31, no. 8, pp. 1112. https://doi.org/10.1016/j.ejmp.2015.08.006

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

SN - 1120-1797

VL - 31

SP - 1112

JO - Physica Medica

JF - Physica Medica

IS - 8

ER -