Table 3 Overview of published national diagnostic reference levels for CT in SPECT/CT
Modality | Examination | Country | CTDIvol (mGy) | DLP (mGy cm) |
|---|---|---|---|---|
SPECT/CT | 99mTc bone imaging (AC/AL-CT) | Australia | – | 240 |
| Â | Â | Bulgaria | 3.0 | 200 |
| Â | Â | Nordic countries | 4.0 | 215 |
| Â | Â | United Kingdom | 4.9 | 150 |
|  | 99mTc bone pelvis (AC/AL-CT) | Switzerland | 10.0 | 410 |
|  | 99mTc bone spine (AC/AL-CT) |  | 5.0 | 190 |
|  | 99mTc bone extremities (AC/AL-CT) |  | 17.0 | 380 |
| Â | 99mTc bone imaging (D-CT) | Japan | 5 | 380 |
|  | 99mTc cardiac imaging (AC-CT) | Australia | – | 40 |
| Â | Â | Bulgaria | 3 | 70 |
| Â | Â | Japan | 4.1 | 85 |
| Â | Â | Nordic countries | 2.2 | 53 |
| Â | Â | Switzerland | 2.0 | 40 |
| Â | Â | United Kingdom | 2.1 | 36 |
|  | 99mTc cardiac imaging (D-CT) | Japan | 4.5 | 180 |
|  | mIBG/octreotide (AC/AL-CT) | Switzerland | 5.0 | 250 |
| Â | Â | United Kingdom | 5.5 | 240 |
|  | 99mTc parathyroid imaging (AC/AL-CT) | Australia | – | 205 |
| Â | Â | Bulgaria | 6.0 | 160 |
| Â | Â | Nordic countries | 5.7 | 199 |
| Â | Â | Switzerland | 4.0 | 160 |
| Â | Â | United Kingdom | 5.6 | 170 |
| Â | 131I post-thyroid ablation (AC/AL-CT) | Bulgaria | 4.0 | 160 |
| Â | Â | Switzerland | 4.0 | 160 |
| Â | Â | United Kingdom | 5.9 | 210 |
| Â | 99mTc thyroid imaging (AC/AL-CT) | Bulgaria | 4.0 | 170 |
| Â | Â | Switzerland | 4.0 | 160 |