From: Gamma camera-specific reference standards for radioactive iodine uptake measurements
Survey questions | Academic medical center #1 | Academic medical center #2 | Community hospital #1 | Community hospital #2 | Community hospital #3 | Community hospital #4 | Community hospital #5 | Community hospital #6 |
---|---|---|---|---|---|---|---|---|
1. Do you perform Iodine-131 therapy (e.g., for treatment of hyperthyroidism, multi-nodular goiter of toxic adenoma)? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
2. Which radionuclide do you use as reference source? | Iodine-123 | Iodine-131 | Iodine-123 | Iodine-123 | Iodine-123 | Iodine-123 | Iodine-123 | Iodine-123 |
3. What amount of activity (in MBq) do you use for the reference source? | 11.1 | 0.5 | 11.1 | 11.1 | 18.5 | 37 | 18.5 | 11.1 |
4. Which formulation do you use for the reference source? | Capsule | Capsule | Capsule | Capsule | Capsule | Capsule | Capsule | Capsule |
5. Do you use a phantom for measurement of the reference source? If so, what kind of phantom? | Neck phantom with a compartment for a capsule | Neck phantom with a compartment for a standard vial | Neck phantom with a compartment for a standard vial | No phantom | Neck phantom with a compartment for a standard vial | Neck phantom with a compartment for a capsule | Neck phantom with a compartment for a standard vial | Neck phantom with a compartment for a capsule |
6. How do you prepare the reference source (before placement in the phantom)? | Direct placement of the capsule inside the phantom | Dissolvement of the capsule in (warm) water in a standard vial | Dissolvement of the capsule in (warm) water in a standard vial | Dissolvement of the capsule in (warm) water in a standard vial | Dissolvement of the capsule in (warm) water in a standard vial | Direct placement of the capsule inside the phantom | Dissolvement of the capsule in (warm) water in a standard vial | Direct placement of the capsule inside the phantom |
7. How often is a new reference source prepared? | Daily | Daily | Weekly | Weekly | Prior to each patient | Daily | Weekly | Weekly |
8. How often is the reference source measured? | Daily | Prior to each patient | Weekly | Weekly | Prior to each patient | Prior to each patient | Daily | Prior to each patient |
9. What distance (in cm) between phantom and collimator head is used? | 10 | 11.5 | 6.7 | 10 | 10 | 10 | 12 | 10 |
10. How long is the reference source measured? | 1Â min | 2Â min | 100 kilocounts | 5Â min | 1Â min | 5Â min | 10Â min | 1Â min |
11. Do you perform a background measurement? | No | Yes, in a separate background scan | No | Yes, in a separate background scan | Yes, in the neck phantom image | No | Yes, in a separate background scan | No |
12. What method is used for determining the number of counts of the reference source? | Manual ROI | Total counts in the whole image | Automatic ROI | Square box ROI | Square box ROI | Automatic ROI | Automatic ROI | Automatic ROI |
13. What type of equipment do you use for RAIU measurement? | Siemens Symbia T6 | Siemens Symbia and Symbia Intevo | Siemens Symbia | Siemens Symbia S or Symbia T | Siemens Symbia and Symbia Intevo | Siemens Symbia T and Symbia Intevo | Siemens Symbia T2 | Siemens Symbia T2 |
Survey questions | Community hospital #7 | Community hospital #8 | Community hospital #9 | Community hospital #10 | Community hospital #11 | Community hospital #12 | Community hospital #13 | Community hospital #14 | Community hospital #15 |
---|---|---|---|---|---|---|---|---|---|
1. Do you perform Iodine-131 therapy (e.g., for treatment of hyperthyroidism, multi-nodular goiter of toxic adenoma)? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
2. Which radionuclide do you use as reference source? | Iodine-131 | Iodine-123 | Iodine-123 | Iodine-131 | Iodine-123 | Iodine-123 | Iodine-123 | Iodine-123 | Iodine-123 |
3. What amount of activity (in MBq) do you use for the reference source? | 10 | 18.5 | 18.5 | 0.5 | 3.7 | 10 | 11.1 | 3.7 | 18.5 |
4. Which formulation do you use for the reference source? | Syringe | Capsule | Capsule | Capsule | Capsule | Syringe | Capsule | Capsule | Capsule |
5. Do you use a phantom for measurement of the reference source? If so, what kind of phantom? | No phantom | No phantom | Neck phantom with a compartment for a standard vial | Neck phantom with a compartment for a standard vial | Neck phantom with a compartment for a standard vial | No phantom | Neck phantom with a compartment for a capsule | No phantom | No phantom |
6. How do you prepare the reference source (before placement in the phantom)? | Not applicable | Dissolvement of the capsule in (warm) water in a standard vial | Dissolvement of the capsule in (warm) water in a standard vial | Dissolvement of the capsule in hydrochloric acid | Direct placement of the capsule in a vial inside the phantom | Placement of syringe on shoulder of patient | Direct placement of the capsule inside the phantom | Not applicable | Not applicable |
7. How often is a new reference source prepared? | One every two weeks | Daily | Weekly | Daily | Prior to each patient | Prior to each patient | Weekly | Prior to each patient | Daily |
8. How often is the reference source measured? | Prior to each patient | Daily | Weekly | Prior to each patient | Prior to each patient | Prior to each patient | Weekly | Prior to each patient | Prior to each patient |
9. What distance (in cm) between phantom and collimator head is used? | Similar distance to the patient scan procedure | 10 | 10 | 25 | 20 | As close to patient as possible | 6 | Not applicable | 13 |
10. How long is the reference source measured? | 1Â min | 5Â min | 1Â min | 5Â min | 5Â min | 2Â min | 1Â min | Reference source is scanned together with the patient | 1Â min |
11. Do you perform a background measurement? | Yes, in a separate background scan | No | Yes, in the neck phantom image | Yes, in the patient image | Yes, in a separate background scan | Yes, in the patient image | Yes, in the neck phantom image | Yes, in the patient image | No |
12. What method is used for determining the number of counts of the reference source? | Automatic ROI | Automatic ROI | Square box ROI | Probe, Iodine-131 peak (330–418 keV) | Total counts in the whole image | Square box ROI | Automatic ROI | Square box ROI | Automatic ROI |
13. What type of equipment do you use for RAIU measurement? | MED Nuklear-Medizintechnik upt2000 | Siemens Symbia S | Siemens Symbia S and Symbia Intevo | Canberra Unispec | Siemens Intevo | Siemens Symbia T | GE NM/CT 870 DR | GE 640/670 | Siemens Symbian Intevo |