Abstract
Objective
T1 mapping has been increasingly applied in the study of tumor. The purpose of this study was to evaluate the value of T1 mapping in evaluating clinicopathologic factors for rectal adenocarcinoma.
Materials and methods
Eighty-six patients with rectal adenocarcinoma confirmed by surgical pathology who underwent preoperative pelvic MRI were retrospectively analyzed. High-resolution T2-weighted imaging (T2WI), T1 mapping, and diffusion-weighted imaging (DWI) were performed. T1 and apparent diffusion coefficient (ADC) parameters were compared among different associated tumor markers, tumor grades, stages, and structure invasion statuses. A receiver operating characteristic (ROC) analysis was estimated.
Results
T1 value showed significant difference between high- and low-grade tumors ([1531.5 ± 84.7 ms] vs. [1437.1 ± 80.3 ms], P < 0.001). T1 value was significant higher in positive than in negative perineural invasion ([1495.7 ± 89.2 ms] vs. [1449.4 ± 88.8 ms], P < 0.05). No significant difference of T1 or ADC was observed in different CEA, CA199, T stage, N stage, lymphovascular invasions, extramural vascular invasion (EMVI), and circumferential resection margin (CRM) (P > 0.05). The AUC under ROC curve of T1 value were 0.796 in distinguishing high- from low-grade rectal adenocarcinoma. The AUC of T1 value in distinguishing perineural invasion was 0.637.
Conclusion
T1 value was helpful in assessing pathologic grade and perineural invasion correlated with rectal cancer.
Graphical abstract
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Data availability
All data generated or analyzed during this study are included in this published article. The datasets are available from the corresponding author on reasonable request.
Abbreviations
- ADC:
-
Apparent diffusion coefficient
- AUC:
-
Area under the curve
- AJCC:
-
American Joint Committee on Cancer
- CRM:
-
Circumferential resection margin
- CI:
-
Confidence interval
- DWI:
-
Diffusion-weighted imaging
- EMVI:
-
Extramural vascular invasion
- MRI:
-
Magnetic resonance imaging
- ROC:
-
Receiver operating characteristic
- ROI:
-
Region of interest
- ss-EPI:
-
Single-shot echo plane imaging
- TNM:
-
Tumor-node-metastasis
- T2W:
-
T2 weighted
- TSE:
-
Turbo spin echo
- TA:
-
Acquisition time
- TE:
-
Echo time
- TR:
-
Repetition time
- WHO:
-
World Health Organization
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The authors acknowledge all the colleagues and participants in this hospital for their supports, especially the Department of MRI, the First Affiliated Hospital of Zhengzhou University.
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JL, YX, and HJ made contribution to collecting patients. JL, LL, and PK made data analysis and interpretation. JL, PK, YZ, and JC were major contributors. All authors made a substantial contribution to researching data, discussion of content, and reviewing and editing manuscript before submission. All authors read and approved the final manuscript.
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Li, J., Kou, P., Lin, L. et al. T1 mapping in evaluation of clinicopathologic factors for rectal adenocarcinoma. Abdom Radiol 49, 279–287 (2024). https://doi.org/10.1007/s00261-023-04045-2
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DOI: https://doi.org/10.1007/s00261-023-04045-2