Article Figures & Data
Figures
- FIG 1.
Flow chart of study participants.
- FIG 2.
Score distribution chart for all 101 patients. Score counts are coded as shades of blue. Two columns (PCon and NCon) provide the result of the confirmation study. Arrows with numbers refer to figures providing CT images of respective patients. PCon and NCon indicate the results of the confirmation studies for the primary site and the neck; P1, P2a, P2b, P3, P4, NI-RADS categories for the primary site; N1, N2, N3, N4, NI-RADS categories for the neck.
- FIG 3.
Pretreatment CT (A) of a patient with OCSCC located in the right glossopharyngeal sulcus. Posttreatment CT (B) of the same patient obtained 36 months after resection and neck dissection on the right side (B). A NI-RADS score of 1 was assigned in B for the primary site by all 4 readers. The white arrow indicates the cancer lesion in the primary site (A) and the fattily degenerated muscle flap after resection (B).
- FIG 4.
Posttreatment CTs of a patient with OPSCC located in the left mouth floor obtained 3 months (A) and 15 months (B) after resection and neck dissection on the left side. A NI-RADS score of 4 was assigned in B for the primary site by all 4 readers. Histopathology confirmed recurrence. The white arrow indicates a new enhancing mass in the mouth floor.
- FIG 5.
Posttreatment CTs of a patient with OCSCC located in the anterior mouth floor obtained 12 (A) and 24 (B) months after resection and bilateral neck dissection. The patient’s position differed slightly between the 2 posttreatment CT scans. NI-RADS scores of 2a, 2b, 1, and 1 reflect inconsistent interpretation of the primary site (indicated by the white arrows) in B. Histopathology revealed no malignancy.
- FIG 6.
Pretreatment CT (A) of a patient with OCSCC located in the buccal mucosa in the upper left quadrant. Posttreatment CT (B) of the same patient 3 months after resection and neck dissection on the left side shows an enlarged and necrotic parotid lymph node on the left side as indicated by the white arrows. A NI-RADS score of 3 was assigned in B for the neck by all 4 readers, and histopathology confirmed malignancy.
Tables
Group Primary Site Neck W τB κF κw W τB κF κw Overall 0.74 0.48 0.80 0.50 More experienced readers 0.50 0.80 0.60 0.76 Less experienced readers 0.82 0.96 0.96 0.99 No recurrence 0.56 0.30 0.56 0.29 Recurrence 0.96 0.65 0.78 0.41 NI-RADS 1 and 2 merged 0.51 0.23 0.56 0.26 NI-RADS 3 and 4 merged 0.85 0.56 0.59 0.44 Reader Primary Site Neck τB κw τB κw A 0.73 0.85 0.86 0.93 B 0.67 0.90 0.86 0.95 C 0.82 0.96 0.86 0.94 D 0.76 0.92 0.76 0.89 NI-RADS Score Score Count Recurrence No Recurrence Recurrence Rate Primary 1 84 3 81 3.57% Primary 2a 6 0 6 0% Primary 2b 3 1 2 33.33% Primary 3 4 2 2 50% Primary 4 4 4 0 100% Node 1 83 0 83 0% Node 2 7 1 6 14.29% Node 3 5 4 1 80% Node 4 6 5 1 83.33% ↵a The most experienced reader D was decisive in case of tied score counts.
