Spectrum Dynamics of Caesarea, Israel, highlighted two new imaging protocols for use on the company's D-SPECT gamma camera at the SNM annual meeting in Toronto.
One protocol, developed at Cedars-Sinai Medical Center in Los Angeles, is a sequential, rather than simultaneous, dual-isotope high-speed method for myocardial perfusion imaging. The protocol uses low doses of 2 mCi of thallium-201 for rapid stress imaging and 7 to 8 mCi of technetium-99m for rest imaging.
Through the protocol, designed specifically for the D-SPECT, patients can complete an exam in approximately 28 minutes. The protocol is currently available.
Also under development is a simultaneous dual-isotope imaging protocol, which uses 7 mCi of technetium-99m sestamibi and 2 mCi of thallium. After sestamibi injection, the patient exercises. When that task is completed, thallium is injected and a 12-minute scan is performed to acquire both the rest and stress images at the same time.
The advantage is that a patient remains in the same position for the duration of one scan, rather than returning for a second rest or stress imaging procedure and changing position from the first scan. The protocol will be available by the end of the year.
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