Comparison of MRI-based and CT/MRI fusion–based postimplant dosimetric analysis of prostate brachytherapy

RETRACTED: <i>Usefulness of Iron-Containing Fiducial Marker for Prostate Radiotherapy</i>

“…In addition, real-time tracking can reduce However, the prostatic outlines are indistinct, and treatment adjustment and contouring of the organs can prove difficult when using CT alone As such, MRI is often used to compensate for any shortcomings of CT [4] [5]. Because the prostatic outlines are clearer on MRI, it is performed after CT and is registered under the guidance of markers.…”

Initial experience of using an iron-containing fiducial marker for radiotherapy of prostate cancer: Advantages in the visualization of markers in Computed Tomography and Magnetic Resonance Imaging

“…As such, MRI is often used to compensate for any shortcomings of CT [4,5]. Because the prostatic outlines are clearer on MRI, it is performed after CT and is registered under the guidance of markers.…”

“…In addition, the prostate is a small organ, and the presence of metal either in the marker or within the organ itself may influence the dose distribution. Tanaka et al developed an optimal MRI sequence based on marker size, and a marker diameter of 0.35 mm has since been adopted at our hospital [4,5].…”

CT-based postimplant dosimetry of prostate brachytherapy: comparison of 1-mm and 5-mm section CT

“…2,[4][5][6][7][8][9] Although CT/magnetic resonance imaging (MRI) fusion is the best available tool for visualizing the prostate and seeds, MRI has the disadvantages of high cost and low availability. [11][12][13] For these reasons, CT-based dosimetry is widespread as a preferred modality for postimplant dosimetry owing to its availability, low cost, and the capability of visualizing the prostate and the seeds. The basic methods of CT-based postimplant dosimetry have changed little.…”