Improved motion compensation in 3D-CT using respiratory-correlated segment reconstruction: diagnostic and radiotherapy applications

The British Journal of Radiology
Shinichiro MoriS Minohara

Abstract

Conventional respiratory-gated CT and four-dimensional CT (4DCT) are disadvantaged by their low temporal resolution, which results in the inclusion of anatomic motion-induced artefacts. These represent a significant source of error both in radiotherapy treatment planning for the thorax and upper abdomen and in diagnostic procedures. In particular, temporal resolution and image quality are vitally important to accurate diagnosis and the minimization of planning target volume margin due to respiratory motion. To improve both temporal resolution and signal-to-noise ratio (SNR), we developed a respiratory-correlated segment reconstruction method (RS) and adapted it to the Feldkamp-Davis-Kress algorithm (FDK) with a 256 multidetector row CT (256MDCT). The 256MDCT scans approximately 100 mm in the craniocaudal direction with a 0.5 mm slice thickness in one rotation. Data acquisition for the RS-FDK relies on the assistance of a respiratory sensing system operating in cine scan mode (continuous axial scan with the table stationary). We evaluated the RS-FDK for volume accuracy and image noise in a phantom study with the 256MDCT and compared results with those for a full scan (FS-FDK), which is usually employed in conventional 4DCT and i...Continue Reading

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Citations

Jul 17, 2012·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·R DarweshA C Perkins
Dec 13, 2006·Lung Cancer : Journal of the International Association for the Study of Lung Cancer·Shinichiro MoriMasayuki Baba
Nov 14, 2006·European Journal of Radiology·Shinichiro Mori, Masahiro Endo
Nov 15, 2012·Journal of Applied Clinical Medical Physics·Shinichiro MoriKoji Noda
Oct 5, 2006·Physics in Medicine and Biology·Shinichiro MoriHiroshi Asakura
Nov 13, 2013·Nuclear Medicine Communications·Reem M DarweshAlan C Perkins

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