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Kanani, Abolfazl, Fatemi-Ardakani, Ali, Owrangi, Amir M., Yazdi, Mehran, Baghbani, Hadi, Mosleh-Shirazi, Mohammad Amin. (1402). Quantification of Artifacts and Image Distortions in 1.5 Tesla Magnetic Resonance Images of a Commercial Multi-Channel Vaginal Cylinder Brachytherapy Applicator Set. سامانه مدیریت نشریات علمی, 13(6), 523-534. doi: 10.31661/jbpe.v0i0.2309-1665
Abolfazl Kanani; Ali Fatemi-Ardakani; Amir M. Owrangi; Mehran Yazdi; Hadi Baghbani; Mohammad Amin Mosleh-Shirazi. "Quantification of Artifacts and Image Distortions in 1.5 Tesla Magnetic Resonance Images of a Commercial Multi-Channel Vaginal Cylinder Brachytherapy Applicator Set". سامانه مدیریت نشریات علمی, 13, 6, 1402, 523-534. doi: 10.31661/jbpe.v0i0.2309-1665
Kanani, Abolfazl, Fatemi-Ardakani, Ali, Owrangi, Amir M., Yazdi, Mehran, Baghbani, Hadi, Mosleh-Shirazi, Mohammad Amin. (1402). 'Quantification of Artifacts and Image Distortions in 1.5 Tesla Magnetic Resonance Images of a Commercial Multi-Channel Vaginal Cylinder Brachytherapy Applicator Set', سامانه مدیریت نشریات علمی, 13(6), pp. 523-534. doi: 10.31661/jbpe.v0i0.2309-1665
Kanani, Abolfazl, Fatemi-Ardakani, Ali, Owrangi, Amir M., Yazdi, Mehran, Baghbani, Hadi, Mosleh-Shirazi, Mohammad Amin. Quantification of Artifacts and Image Distortions in 1.5 Tesla Magnetic Resonance Images of a Commercial Multi-Channel Vaginal Cylinder Brachytherapy Applicator Set. سامانه مدیریت نشریات علمی, 1402; 13(6): 523-534. doi: 10.31661/jbpe.v0i0.2309-1665

Quantification of Artifacts and Image Distortions in 1.5 Tesla Magnetic Resonance Images of a Commercial Multi-Channel Vaginal Cylinder Brachytherapy Applicator Set

Journal of Biomedical Physics and Engineering
مقاله 4، دوره 13، شماره 6، اسفند 2023، صفحه 523-534    اصل مقاله (1.27 M)
نوع مقاله: Original Research
شناسه دیجیتال (DOI): 10.31661/jbpe.v0i0.2309-1665
نویسندگان
Abolfazl Kanani1؛ Ali Fatemi-Ardakani2، 3، 4؛ Amir M. Owrangi5؛ Mehran Yazdi6؛ Hadi Baghbani7؛ Mohammad Amin Mosleh-Shirazi* 1، 8
1Ionizing and Non-Ionizing Radiation Protection Research Center (INIRPRC), School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
2Department of Physics, Jackson State University (JSU), Jackson, Mississippi, USA
3SpinTecx, Jackson, Mississippi, USA
4Department of Radiation Oncology, Community Health Systems (CHS) Cancer Network, Jackson, Mississippi, USA
5Department of Radiation Oncology, UT Southwestern Medical Center, 2280 Inwood Rd, EC2.242, Dallas, TX 75235, USA
6Signal and Image Processing Lab (SIPL), School of Electrical and Computer Eng, Shiraz University, Shiraz, Iran
7Department of Radiology, Namazi Hospital, Shiraz University of Medical Sciences, Shiraz, Iran
8Physics Unit, Department of Radio-Oncology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
چکیده
Background: The BEBIG Portio multi-channel applicator provides better target dose coverage and sparing organs-at-risk compared to a single-channel cylinder. However, artifacts and distortions of Portio in magnetic resonance images (MRI) have not yet been reported.
Objective: We aimed to quantify the artifacts and distortions in its 1.5-Tesla MR images before clinical use.
Material and Methods: In this experimental study, we employed a gelatin-filled phantom to conduct our measurements. T2-weighted (T2W) images were examined for artifacts and distortions. Computed tomography (CT) images were used as a reference to assess image distortions. Artifact severity was measured by recording the full-width-at-half-maximum (FWHM) image pixel values at various positions along the length of the applicator/channels. CT and MRI-based applicator reconstruction accuracy were then compared, and signal-to-noise ratio (SNR) and contrast were also determined for the applicator images.
Results: The applicator distortion level for the Portio applicator was less than the image spatial resolution (0.5±0.5 pixels). The average FWHM for the tandem applicator images was 5.23±0.39 mm, while it was 3.21±0.37 mm for all channels (compared to their actual diameters of 5.0 mm and 3.0 mm, respectively). The average applicator reconstruction difference between CT and MR images was 0.75±0.30 mm overall source dwell positions. The image SNR and contrast were both acceptable. 
Conclusion: These findings indicate that the Portio applicator has a satisfactory low level of artifacts and image distortions in 1.5-Tesla, T2W images. It may, therefore, be a promising option for MRI-guided multi-channel vaginal brachytherapy.

تازه های تحقیق

Abolfazl Kanani (Google Scholar)

Mohammad Amin Mosleh-Shirazi (Google Scholar)

کلیدواژه‌ها
Magnetic Resonance Imaging؛ Radiotherapy؛ Brachytherapy؛ Portio Applicator؛ Image Processing؛ Gynecolgical؛ Endometrial Cancer
سایر فایل های مرتبط با مقاله
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