Purpose. To evaluate signal intensity (SI) differences between 3.0 T and 1.5 T on T2-weighted (T2w), diffusion-weighted imaging (DWI), and apparent diffusion coefficient (ADC) in rectal cancer pre-, during, and postneoadjuvant chemoradiotherapy (CRT). Materials and Methods. 22 patients with locally advanced rectal cancer were prospectively enrolled. All patients underwent T2w, DWI, and ADC pre-, during, and post-CRT on both 3.0 T MRI and 1.5 T MRI. A radiologist drew regions of interest (ROIs) of the tumor and obturator internus muscle on the selected slice to evaluate SI and relative SI (rSI). Additionally, a subanalysis evaluating the SI before and after-CRT (ΔSI pre-post) in complete responder patients (CR) and nonresponder patients (NR) on T2w, DWI, and ADC was performed. Results. Significant differences were observed for T2w and DWI on 3.0 T MRI compared to 1.5 T MRI pre-, during, and post-CRT (all P<0.001), whereas no significant differences were reported for ADC among all controls (all P>0.05). rSI showed no significant differences in all the examinations for all sequences (all P>0.05). ΔSI showed significant differences between 3.0 T and 1.5 T MRI for DWI-ΔSI in CR and NR (188.39±166.90 vs. 30.45±21.73 and 169.70±121.87 vs. 22.00±31.29, respectively, all P 0.02) and ADC-ΔSI for CR (-0.58±0.27 vs. -0.21±0.24P value 0.02), while no significant differences were observed for ADC-ΔSI in NR and both CR and NR for T2w-ΔSI. Conclusion. T2w-SI and DWI-SI showed significant differences for 3.0 T compared to 1.5 T in all three controls, while ADCSI showed no significant differences in all three controls on both field strengths. rSI was comparable for 3.0 T and 1.5 T MRI in rectal cancer patients; therefore, rectal cancer patients can be assessed both at 3.0 T MRI and 1.5 T MRI. However, a significant DWI-ΔSI and ADC-ΔSI on 3.0 T in CR might be interpreted as a better visual assessment in discriminating response to therapy compared to 1.5 T. Further investigations should be performed to confirm future possible clinical application.

Magnetic resonance of rectal cancer response to therapy: an Image quality comparison between 3.0 and 1.5 Tesla / Caruso, D.; Zerunian, M.; De Santis, D.; Biondi, T.; Paolantonio, P.; Rengo, M.; Bellini, D.; Ferrari, R.; Ciolina, M.; Lucertini, E.; Polici, M.; Iannicelli, E.; Tombolini, V.; Laghi, A.. - In: BIOMED RESEARCH INTERNATIONAL. - ISSN 2314-6133. - 2020:(2020), pp. -8. [10.1155/2020/9842732]

Magnetic resonance of rectal cancer response to therapy: an Image quality comparison between 3.0 and 1.5 Tesla

Caruso D.
Primo
;
Zerunian M.
Secondo
;
De Santis D.;Rengo M.;Bellini D.;Ferrari R.;Ciolina M.;Lucertini E.;Polici M.;Iannicelli E.;Tombolini V.
Penultimo
;
Laghi A.
Ultimo
2020

Abstract

Purpose. To evaluate signal intensity (SI) differences between 3.0 T and 1.5 T on T2-weighted (T2w), diffusion-weighted imaging (DWI), and apparent diffusion coefficient (ADC) in rectal cancer pre-, during, and postneoadjuvant chemoradiotherapy (CRT). Materials and Methods. 22 patients with locally advanced rectal cancer were prospectively enrolled. All patients underwent T2w, DWI, and ADC pre-, during, and post-CRT on both 3.0 T MRI and 1.5 T MRI. A radiologist drew regions of interest (ROIs) of the tumor and obturator internus muscle on the selected slice to evaluate SI and relative SI (rSI). Additionally, a subanalysis evaluating the SI before and after-CRT (ΔSI pre-post) in complete responder patients (CR) and nonresponder patients (NR) on T2w, DWI, and ADC was performed. Results. Significant differences were observed for T2w and DWI on 3.0 T MRI compared to 1.5 T MRI pre-, during, and post-CRT (all P<0.001), whereas no significant differences were reported for ADC among all controls (all P>0.05). rSI showed no significant differences in all the examinations for all sequences (all P>0.05). ΔSI showed significant differences between 3.0 T and 1.5 T MRI for DWI-ΔSI in CR and NR (188.39±166.90 vs. 30.45±21.73 and 169.70±121.87 vs. 22.00±31.29, respectively, all P 0.02) and ADC-ΔSI for CR (-0.58±0.27 vs. -0.21±0.24P value 0.02), while no significant differences were observed for ADC-ΔSI in NR and both CR and NR for T2w-ΔSI. Conclusion. T2w-SI and DWI-SI showed significant differences for 3.0 T compared to 1.5 T in all three controls, while ADCSI showed no significant differences in all three controls on both field strengths. rSI was comparable for 3.0 T and 1.5 T MRI in rectal cancer patients; therefore, rectal cancer patients can be assessed both at 3.0 T MRI and 1.5 T MRI. However, a significant DWI-ΔSI and ADC-ΔSI on 3.0 T in CR might be interpreted as a better visual assessment in discriminating response to therapy compared to 1.5 T. Further investigations should be performed to confirm future possible clinical application.
2020
magnetic resonance imaging (MRI); rectal cancer; 1.5-Tesla; image quality
01 Pubblicazione su rivista::01a Articolo in rivista
Magnetic resonance of rectal cancer response to therapy: an Image quality comparison between 3.0 and 1.5 Tesla / Caruso, D.; Zerunian, M.; De Santis, D.; Biondi, T.; Paolantonio, P.; Rengo, M.; Bellini, D.; Ferrari, R.; Ciolina, M.; Lucertini, E.; Polici, M.; Iannicelli, E.; Tombolini, V.; Laghi, A.. - In: BIOMED RESEARCH INTERNATIONAL. - ISSN 2314-6133. - 2020:(2020), pp. -8. [10.1155/2020/9842732]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1458365
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