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Table 2: Summary of Hounsfield units by phase and lesion type using 2 categories—recurrence and benign (includes both normal and diseased thyroid)
Phase/Group No. Mean SD Min Max P Value
Precontrast 
 Benign thyroid 58 98.55 19.79 54 138 <.001
 Recurrence 29 37.09 17.91 10.8 93
Arterial 
 Benign thyroid 58 209.59 42.06 131 331 <.001
 Recurrence 29 99.98 37.67 39.7 174
Venous 
 Benign thyroid 58 176.38 36.47 96 263 <.001
 Recurrence 29 90.61 31.69 28.2 156
Delayed 
 Benign thyroid 58 158.19 31.19 94 238 <.001
 Recurrence 29 87.83 28.6 24.2 155
Note:—Min indicates minimum; Max, maximum.

Phase/Group	No.	Mean	SD	Min	Max	P Value
Precontrast
Benign thyroid	58	98.55	19.79	54	138	<.001
Recurrence	29	37.09	17.91	10.8	93	<.001
Arterial
Benign thyroid	58	209.59	42.06	131	331	<.001
Recurrence	29	99.98	37.67	39.7	174	<.001
Venous
Benign thyroid	58	176.38	36.47	96	263	<.001
Recurrence	29	90.61	31.69	28.2	156	<.001
Delayed
Benign thyroid	58	158.19	31.19	94	238	<.001
Recurrence	29	87.83	28.6	24.2	155	<.001