Table 2 Absolute radiodensity measurements in stenosis groups.

From: Assessments of arterial and venous phase radiodensity does not improve carotid near-occlusion diagnostics

Measurement point

Near-occlusion (n = 62)

Conventional ≥ 50% stenosis (n = 31)

P (t-test)

Arterial phase

 Proximal index ICA

335 (91)

401 (62)

 < 0.001

 Distal index ICA

357 (64)

398 (64)

0.06

 Proximal contralateral ICA

371 (72)

400 (64)

0.08

 Distal contralateral ICA

367 (70)

397 (62)

0.063

 Proximal vertebral

364 (63)

385 (53)

0.13

 Distal vertebral

345 (60)

355 (64)

0.47

Venous phase

 Proximal index ICA

209 (82)

263 (96)

0.006

 Distal index ICA

239 (87)

301 (103)

0.004

 Proximal contralateral ICA

190 (74)

249 (88)

0.002

 Distal contralateral ICA

219 (82)

287 (97)

0.001

 Proximal vertebral

200 (77)

271 (100)

 < 0.001

 Distal vertebral

239 (81)

312 (107)

 < 0.001

  1. ICA Internal carotid artery.
  2. All values are mean (SD) for Hounsfield units.
  3. Vertebral: The largest of the two vertebrals was measured.
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