Quantification of Artifacts and Image Distortions in 1.5 Tesla Magnetic Resonance Images of a Commercial Multi-Channel Vaginal Cylinder Brachytherapy Applicator Set
Copyright: © Journal of Biomedical Physics and Engineering..
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.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2023 |
|---|---|
| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:13 |
|---|---|
| Enthalten in: |
Journal of biomedical physics & engineering - 13(2023), 6 vom: 22. Dez., Seite 523-534 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Kanani, Abolfazl [VerfasserIn] |
|---|
| Links: |
|---|
| Themen: |
Brachytherapy |
|---|
| Anmerkungen: |
Date Revised 28.12.2023 published: Electronic-eCollection Citation Status PubMed-not-MEDLINE |
|---|
| doi: |
10.31661/jbpe.v0i0.2309-1665 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM366396161 |
|---|
| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM366396161 | ||
| 003 | DE-627 | ||
| 005 | 20231229124253.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231229s2023 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.31661/jbpe.v0i0.2309-1665 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n1241.xml |
| 035 | |a (DE-627)NLM366396161 | ||
| 035 | |a (NLM)38148963 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Kanani, Abolfazl |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Quantification of Artifacts and Image Distortions in 1.5 Tesla Magnetic Resonance Images of a Commercial Multi-Channel Vaginal Cylinder Brachytherapy Applicator Set |
| 264 | 1 | |c 2023 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Revised 28.12.2023 | ||
| 500 | |a published: Electronic-eCollection | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Copyright: © Journal of Biomedical Physics and Engineering. | ||
| 520 | |a 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 | ||
| 520 | |a Objective: We aimed to quantify the artifacts and distortions in its 1.5-Tesla MR images before clinical use | ||
| 520 | |a 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 | ||
| 520 | |a 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 | ||
| 520 | |a 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 | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Brachytherapy | |
| 650 | 4 | |a Endometrial Cancer | |
| 650 | 4 | |a Gynecolgical | |
| 650 | 4 | |a Image Processing | |
| 650 | 4 | |a Magnetic Resonance Imaging | |
| 650 | 4 | |a Portio Applicator | |
| 650 | 4 | |a Radiotherapy | |
| 700 | 1 | |a Fatemi-Ardakani, Ali |e verfasserin |4 aut | |
| 700 | 1 | |a Owrangi, Amir M |e verfasserin |4 aut | |
| 700 | 1 | |a Yazdi, Mehran |e verfasserin |4 aut | |
| 700 | 1 | |a Baghbani, Hadi |e verfasserin |4 aut | |
| 700 | 1 | |a Mosleh-Shirazi, Mohammad Amin |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Journal of biomedical physics & engineering |d 2013 |g 13(2023), 6 vom: 22. Dez., Seite 523-534 |w (DE-627)NLM244578109 |x 2251-7200 |7 nnns |
| 773 | 1 | 8 | |g volume:13 |g year:2023 |g number:6 |g day:22 |g month:12 |g pages:523-534 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.31661/jbpe.v0i0.2309-1665 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 13 |j 2023 |e 6 |b 22 |c 12 |h 523-534 | ||