Investigation of MR image distortion for radiotherapy treatment planning of prostate cancer

Physics in Medicine and Biology
Z ChenL Chen

Abstract

MR imaging based treatment planning for radiotherapy of prostate cancer is limited due to MR imaging system related geometrical distortions, especially for patients with large body sizes. On our 0.23 T open scanner equipped with the gradient distortion correction (GDC) software, the residual image distortions after the GDC were <5 mm within the central 36 cm x 36 cm area for a standard 48 cm field of view (FOV). In order to use MR imaging alone for treatment planning the effect of residual MR distortions on external patient contour determination, especially for the peripheral regions outside the 36 cm x 36 cm area, must be investigated and corrected. In this work, we performed phantom measurements to quantify MR system related residual geometric distortions after the GDC and the effective FOV. Our results show that for patients with larger lateral dimensions (>36 cm), the differences in patient external contours between distortion-free CT images and GDC-corrected MR images were 1-2 cm because of the combination of greater gradient distortion and loss of field homogeneity away from the isocentre and the uncertainties in patient setup during CT and MRI scans. The measured distortion maps were used to perform point-by-point correc...Continue Reading

References

Jan 1, 1994·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·T SumanaweeraS Napel
Jul 15, 1996·International Journal of Radiation Oncology, Biology, Physics·M RoachH Hricak
Apr 30, 1998·Journal of Magnetic Resonance Imaging : JMRI·W Y Guo
Jul 4, 1998·International Journal of Radiation Oncology, Biology, Physics·M J ZelefskyZ Fuks
Jul 4, 1998·International Journal of Radiation Oncology, Biology, Physics·G E HanksM A Hunt
Aug 6, 1998·The British Journal of Radiology·A W BeavisV J Whitton
Feb 16, 1999·International Journal of Radiation Oncology, Biology, Physics·C RaschJ V Lebesque
Nov 26, 1999·International Journal of Radiation Oncology, Biology, Physics·M DeboisL Vanuytsel
Dec 1, 2000·Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology·A PollackI Rosen
Mar 10, 2001·Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al]·A FranssonR Pötter
Jun 14, 2002·International Journal of Radiation Oncology, Biology, Physics·Dennis MahGerald E Hanks
Mar 22, 2003·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Young K LeeSteve Webb
Sep 24, 2004·International Journal of Radiation Oncology, Biology, Physics·Lili ChenAlan Pollack
Dec 22, 2004·Physics in Medicine and Biology·L ChenA Pollack
Feb 16, 2005·Annual Review of Physiology·Tsung-Yu Chen

❮ Previous
Next ❯

Citations

Sep 17, 2014·International Journal of Radiation Oncology, Biology, Physics·Juan YangFang-Fang Yin
Sep 19, 2006·The British Journal of Radiology·G S Payne, M O Leach
May 24, 2008·International Journal of Radiation Oncology, Biology, Physics·Robert A Cormack
Dec 4, 2015·Medical Physics·Shengzhen TaoMatt A Bernstein
Mar 18, 2015·Zeitschrift für medizinische Physik·Alberto TorresinFrank Lohr
Jul 15, 2015·Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al]·Tiina SeppäläKauko Saarilahti
May 19, 2007·Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association·J LyonsA F Pruitt
Nov 26, 2010·Journal of Magnetic Resonance Imaging : JMRI·Jürgen BiedererJulien Dinkel
Oct 10, 2014·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Shengzhen TaoMatt A Bernstein
Jul 18, 2015·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Shengzhen TaoMatt A Bernstein
Dec 3, 2014·International Journal of Radiation Oncology, Biology, Physics·Joshua KimIndrin J Chetty
Jun 30, 2016·International Journal of Radiation Oncology, Biology, Physics·Joseph WeygandJihong Wang
Sep 11, 2014·Journal of Applied Clinical Medical Physics·Alexander L ChinBoon-Keng Kevin Teo
Mar 4, 2021·Biomedical Physics & Engineering Express·Prabhakar RamachandranGeorge McGill

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

© 2021 Meta ULC. All rights reserved