TY - JOUR
T1 - Effective radiation dose of three diagnostic tests in cardiology
T2 - Single photon emission computed tomography, invasive coronary angiography and cardiac computed tomography angiography
AU - De Araújo Gonçalves, Pedro
AU - Sousa, Pedro Jerónimo
AU - Calé, Rita
AU - Marques, Hugo
AU - Dos Santos, Miguel Borges
AU - Dias, André
AU - Dores, Hélder
AU - Carvalho, Maria Salomé
AU - Ventosa, António
AU - Martins, Teresa
AU - Teles, Rui Campante
AU - Almeida, Manuel
AU - Mendes, Miguel
PY - 2013/12
Y1 - 2013/12
N2 - Introduction: Diagnostic tests that use ionizing radiation play a central role in cardiology and their use has grown in recent years, leading to increasing concerns about their potential stochas-tic effects. The aims of this study were to compare the radiation dose of three diagnostic tests: single photon emission computed tomography (SPECT), invasive coronary angiography (ICA) and cardiac computed tomography (cardiac CT) and their evolution over time, and to assess the influence of body mass index on radiation dose. Methods: We assessed consecutive patients included in three prospective registries (SPECT, ICA and cardiac CT) over a period of two years. Radiation dose was converted to mSv and compared between the three registries. Differences over time were evaluated by comparing the first with the fourth semester. Results: A total of 6196 exams were evaluated: 35% SPECT, 53% ICA and 22% cardiac CT. Mean radiation dose was 10.7±1.2 mSv for SPECT, 8.1±6.4 mSv for ICA, and 5.4±3.8 mSv for cardiac CT (p<0.001 for all). With regard to the radiation dose over time, there was a very small reduction in SPECT (10.7 to 10.5 mSv, p=0.004), a significant increase (25%) in ICA (7.0 to 8.8mSv; p<0.001), and a significant reduction (29%) in cardiac CT (6.5 to 4.6 mSv, p<0.001). Obesity was associated with a significantly higher radiation dose in all three exams. Conclusions: Cardiac CT had a lower mean effective radiation dose than invasive coronary angiography, which in turn had a lower mean effective dose than SPECT. There was a significant increase in radiation doses in the ICA registry and a significant decrease in the cardiac CT registry over time.
AB - Introduction: Diagnostic tests that use ionizing radiation play a central role in cardiology and their use has grown in recent years, leading to increasing concerns about their potential stochas-tic effects. The aims of this study were to compare the radiation dose of three diagnostic tests: single photon emission computed tomography (SPECT), invasive coronary angiography (ICA) and cardiac computed tomography (cardiac CT) and their evolution over time, and to assess the influence of body mass index on radiation dose. Methods: We assessed consecutive patients included in three prospective registries (SPECT, ICA and cardiac CT) over a period of two years. Radiation dose was converted to mSv and compared between the three registries. Differences over time were evaluated by comparing the first with the fourth semester. Results: A total of 6196 exams were evaluated: 35% SPECT, 53% ICA and 22% cardiac CT. Mean radiation dose was 10.7±1.2 mSv for SPECT, 8.1±6.4 mSv for ICA, and 5.4±3.8 mSv for cardiac CT (p<0.001 for all). With regard to the radiation dose over time, there was a very small reduction in SPECT (10.7 to 10.5 mSv, p=0.004), a significant increase (25%) in ICA (7.0 to 8.8mSv; p<0.001), and a significant reduction (29%) in cardiac CT (6.5 to 4.6 mSv, p<0.001). Obesity was associated with a significantly higher radiation dose in all three exams. Conclusions: Cardiac CT had a lower mean effective radiation dose than invasive coronary angiography, which in turn had a lower mean effective dose than SPECT. There was a significant increase in radiation doses in the ICA registry and a significant decrease in the cardiac CT registry over time.
KW - Cardiac computed tomography
KW - Invasive coronary angiography
KW - Ionizing radiation
KW - Obesity
KW - Single photon emission computed tomography
UR - http://www.scopus.com/inward/record.url?scp=84893666825&partnerID=8YFLogxK
U2 - 10.1016/j.repc.2013.05.005
DO - 10.1016/j.repc.2013.05.005
M3 - Article
C2 - 24287017
AN - SCOPUS:84893666825
SN - 0870-2551
VL - 32
SP - 981
EP - 986
JO - Revista Portuguesa de Cardiologia
JF - Revista Portuguesa de Cardiologia
IS - 12
ER -