I like to use other words and think this is serious.
I think on all imaging techniques is must be standardized and have common output (quantitative results) to be really useful in personalized medicine. Of course one can keep it simple, what you see is what you trust and what you base your diagnosis on. In PET CT already since appr 2003 a standardization started on using SUV , later on with EARL initiatives all scanners regardless of make and age and scanning methodology can be aligned. This now is true by carefully using monte carlo based modelling techniques and proper calibration for SPECT CT's of all makes (since 2000). Our company Hermes offers this technology and has provided much proof on various isotopes since 2014. Even aligned 12 camera's at different sites in Finland to provide standard output MBq/voxel. From there you can take it into Dosimetry for eg Lu which we do too. Feel free to start a personal discussion, your question is RELEVANT! Peter
You can look at the recently published work on CT (using data from the American College of Radiology National Radiology Data Registry at:
Article U.S. Diagnostic Reference Levels and Achievable Doses for 10...
Observation approach, Focus group, qualitative approach such as In-depth interview
Go to the International Atomic Energy Agency website for information about how National DRLs are to be set.
May you clarify your question. Do you intend to do a research on the diangostic value of SPECT and CT and you want know the reference test?
Or you want do quality control for the SPECT and CT machines?
For your information, provided below are the Japanese diagnostic reference levels set by J-RIME (Japan Network for Research and Information on Medical Exposure) .
The Japanese diagnostic reference levels for the adult CT scanning in terms of volume CT dose index (CTDIvol) are as below, assuming body weight of 50–60 kg (except for 50–70 kg for the coronary artery scanning).
85 mGy for the head (plain routine)
15 mGy for the chest (single phase)
18 mGy for the chest to pelvis (single phase)
20 mGy for the upper abdomen to pelvis (single phase)
15 mGy for the liver (dynamic)
90 mGy for the coronary artery (dynamic)
The Japanese diagnostic reference levels for the pediatric CT scanning in terms of volume CT dose index (CTDIvol) are as below.
38 mGy for the head, 11 mGy for the chest and 11 mGy for the abdomen below age 1 year
47 mGy for the head, 14 mGy for the chest and 16 mGy for the abdomen at age 1–5 years
60 mGy for the head, 15 mGy for the chest and 17 mGy for the abdomen at age 6–10 years
For your information, the Japanese diagnostic reference levels for the adult CT scanning in terms of dose length product (DLP) are as below, assuming body weight of 50–60 kg (except for 50–70 kg for the coronary artery scanning).
1350 mGy cm for the head (plain routine)
550 mGy cm for the chest (single phase)
1300 mGy cm for the chest to pelvis (single phase)
1000 mGy cm for the upper abdomen to pelvis (single phase)
1800 mGy cm for the liver (dynamic)
1400 mGy cm for the coronary artery (dynamic)
The Japanese diagnostic reference levels for the pediatric CT scanning in terms of dose length product (DLP) are as below.
500 mGy cm for the head, 210 mGy cm for the chest and 220 mGy cm for the abdomen below age 1 year
660 mGy cm for the head, 300 mGy cm for the chest and 400 mGy cm for the abdomen at age 1–5 years
850 mGy cm for the head, 410 mGy cm for the chest and 530 mGy cm for the abdomen at age 6–10 years
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