Table 1. Acquisition Techniques for the Clinical and Micro-CT System.
Type of Scanner | Tube Type | Exposure Time, s | Tube Current Time, mAsa | Section Thickness, mm | |
---|---|---|---|---|---|
Voltage, kVp | Current, mA | ||||
Siemens SOMATOM Force CT scannerb | |||||
A, inner ear ultrahigh resolution | 70 | 525 | 1.00 | 525 | 0.400 |
B, head | 80 | 11 | 0.91 | 10 | 0.625 |
C, inner ear ultrahigh resolution | 100 | 98 | 0.5 | 49 | 0.600 |
D, inner ear ultrahigh resolution | 150 | 58 | 0.5 | 29 | 0.600 |
E, inner ear ultrahigh resolution | 100 | 98 | 0.5 | 49 | 0.600 |
North Star Imaging micro-CT scanner | |||||
NSI X5000 | 130 | 0.581 | 1806 | 1050 | 0.060 |
Abbreviations: CT, computed tomography; kVp, kilovoltage peak; mAs, milliampere-seconds.
The Combined Applications to Reduce Exposure (CARE) off setting represented maximal resolution capabilities of the clinical scanner and a radiation dose report cannot be generated.
Protocol B was a single-energy acquisition; protocols A, C, D, and E were dual-energy acquisitions.