Table 1.

MR simulation scanning guideline

Sequences	Coverage	Scan parameters
Sagittal T2 (For soft-tissue contouring)	Skin-to-skin (AP) Proximal bladder to rectum (SI) Middle of femoral heads (RL)	2D TSE FH x AP x RL =200x200x128 0.53 × 0.7 × 3 mm3 NSA = 3, TR/TE = (3000-6000)/70, BW = 250 Hz, FA = 90
Goldseed Axial (For fiducial identification)	Covering prostate and seminal vesicles	3D BFFE AP x RL x FH = 180x180x90 0.85 × 0.85 × 1 mm3 NSA = 2, TR/TE = shortest BW = 808 Hz, FA = 20
MRCAT Source MR Axial (For synthetic CT generation)	Skin-to-skin (AP) Skin-to-skin (RL) L4 below to proximal femur (SI)	3D FFE mDIXON AP x RL x FH = 324x324x120 1.7 × 1.7 × 2.5 mm3 TR/TE1/TE2 = 3.9/1.2/2.5, BW = 1072
Axial T2 small FOV (For soft tissue contouring)	Outer body (AP) Femoral heads (RL) L5 to anal canal (entire rectum) (SI)	2D TSE AP x RL x FH = 230x222x180 0.65 × 0.83 × 3 mm3 NSA = 3, TR/TE = (3000-6000)/100, BW = 246 Hz, FA = 90
Coronal T2 (For soft tissue contouring)	Middle of femoral heads (RL) Entire prostate, bladder neck, rectum (SI) Entire prostate, bladder neck, rectum (AP)	2D TSE FH x RL x AP = 180x180x128 0.59 × 0.78 × 3 mm3 NSA = 3, TR/TE = (3000-6000)/70, BW = 257, FA = 90

Abbreviations: TSE turbo spin echo, NSA number of signal averages, BW bandwidth, FA flip angle, TR relaxation time, TE echo time, BFFE balanced fast field echo, FFE fast field echo