Case: Flash Triple Rule Out
Case history
Unclear chest pain.
Diagnosis
Exclusion of coronary artery disease.
Protocol
| Tube voltage 1 (kV) | 120 |
| Tube current 1 (mAs) | 426 |
| DLP | 141 |
| CTDI | 4,8 |
| Flow Rate | 5 |
| Contrast Media | 120 |
| mSv | 2,0 |
| Siemens Scanner | SOMATOM Definition Flash |
This case has been submitted to the Siemens Image Quality Contest 2010.
Keywords:
Dear dr Johnson,
Can you tell me what the HU are of the coronary and pulmonary tree? Did you find that optimal for evalutating both the coronaries and pulmonary arteries? Kind regards, Marc Kock
Thanks for your interest. I had anonymized the image when exporting it, so I cannot tell you the actual values of that dataset. But we are acquiring TRO scans quite frequently these days, and one of today which I am just reading has between 500 and 600 HU in both the pulmonary and coronary arteries, which is certainly sufficient. If you are specifically interested in bolus optimization for this purpose, you may want to have a look at a study I performed on this (Optimization of contrast material administration for electrocardiogram-gated computed tomographic angiography of the chest. Johnson TR, Nikolaou K, Wintersperger BJ, Fink C, Rist C, Leber AW, Knez A, Reiser MF, Becker CR. J Comput Assist Tomogr. 2007 Mar-Apr;31(2):265-71.).