Single rest myocardial perfusion study for the assessment of the extent and severity of non‑viable myocardium, with PET, if: (a) the service is performed because the service to which item 61325 applies cannot be performed due to unavailability of thallous chloride 201 (Tl-201); and (b) the patient has left ventricular systolic dysfunction and probable or confirmed coronary artery disease; and (c) the service is performed in conjunction with a rest myocardial perfusion study using technetium-99m; and (d) the service is requested by a specialist or a consultant physician; and (e) the service is not associated with a service to which item 11704, 11705, 11707, 11714, 11729 or 11730 applies; and (f) this service and item 61325 are applicable only twice each 24 months (R)