TY - JOUR
T1 - Photon-counting CT in Thoracic Imaging
T2 - Early Clinical Evidence and Incorporation Into Clinical Practice
AU - Fletcher, Joel G.
AU - Inoue, Akitoshi
AU - Bratt, Alex
AU - Horst, Kelly K.
AU - Koo, Chi Wan
AU - Rajiah, Prabhakar Shantha
AU - Baffour, Francis I.
AU - Ko, Jane P.
AU - Remy-Jardin, Martine
AU - McCollough, Cynthia H.
AU - Yu, Lifeng
N1 - Publisher Copyright:
© RSNA, 2024.
PY - 2024/3
Y1 - 2024/3
N2 - Photon-counting CT (PCCT) is an emerging advanced CT technology that differs from conventional CT in its ability to directly convert incident x-ray photon energies into electrical signals. The detector design also permits substantial improvements in spatial resolution and radiation dose efficiency and allows for concurrent high-pitch and high-temporal-resolution multienergy imaging. This review summarizes (a) key differences in PCCT image acquisition and image reconstruction compared with conventional CT; (b) early evidence for the clinical benefit of PCCT for high-spatial-resolution diagnostic tasks in thoracic imaging, such as assessment of airway and parenchymal diseases, as well as benefits of high-pitch and multienergy scanning; (c) anticipated radiation dose reduction, depending on the diagnostic task, and increased utility for routine low-dose thoracic CT imaging; (d) adaptations for thoracic imaging in children; (e) potential for further quantitation of thoracic diseases; and (f) limitations and trade-offs. Moreover, important points for conducting and interpreting clinical studies examining the benefit of PCCT relative to conventional CT and integration of PCCT systems into multivendor, multispecialty radiology practices are discussed.
AB - Photon-counting CT (PCCT) is an emerging advanced CT technology that differs from conventional CT in its ability to directly convert incident x-ray photon energies into electrical signals. The detector design also permits substantial improvements in spatial resolution and radiation dose efficiency and allows for concurrent high-pitch and high-temporal-resolution multienergy imaging. This review summarizes (a) key differences in PCCT image acquisition and image reconstruction compared with conventional CT; (b) early evidence for the clinical benefit of PCCT for high-spatial-resolution diagnostic tasks in thoracic imaging, such as assessment of airway and parenchymal diseases, as well as benefits of high-pitch and multienergy scanning; (c) anticipated radiation dose reduction, depending on the diagnostic task, and increased utility for routine low-dose thoracic CT imaging; (d) adaptations for thoracic imaging in children; (e) potential for further quantitation of thoracic diseases; and (f) limitations and trade-offs. Moreover, important points for conducting and interpreting clinical studies examining the benefit of PCCT relative to conventional CT and integration of PCCT systems into multivendor, multispecialty radiology practices are discussed.
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U2 - 10.1148/radiol.231986
DO - 10.1148/radiol.231986
M3 - Review article
C2 - 38501953
AN - SCOPUS:85188450508
SN - 0033-8419
VL - 310
JO - Radiology
JF - Radiology
IS - 3
M1 - e231986
ER -