Table 2 Activity prescription of Tc-99 m Tetrofosmin for one-day and two-day MPI protocol.

From: Diagnostic reference level, achievable dose, and effective dose estimation in adult hybrid SPECT myocardial perfusion imaging in Institut Jantung Negara

Protocol

BMI

Gamma camera

First injection

Second injection

One-day protocol

BMI ≤ 35

GC-1

2.96 MBq/kg – minimum 148 MBq and maximum 370 MBq

Multiply first dose with factor of 3 – maximum 925 MBq

GC-2

≤ 64 kg: 481 MBq (minimum)

Multiply first dose with factor of 2 (maximum: 1100 MBq)

65–79 kg: 518 MBq

80–89 kg: 555 MBq

90–93 kg: 592 MBq

≥ 94 kg: 666 MBq (maximum)

Two-day protocol

BMI ≥ 35

GC-1

370 MBq

370 MBq

GC-2

11.47 MBq/kg

(Min: Nil, Max: 1480 MBq*)

Same as first dose

  1. *It is recommended to discuss with radiation protection officer (RPO) and physician’s opinion to prescribe activity for body weight that resulted more than 1480 MBq.
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