Here is a list of all documented variables with links to the struct/union documentation for each field:

A

B

C

D

E

F

G

H

I

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

_

- q -

• qform_code : NIFTI_1_HEADER, NIFTI_2_HEADER
• qoffset_x : NIFTI_1_HEADER, NIFTI_2_HEADER
• qoffset_y : NIFTI_1_HEADER, NIFTI_2_HEADER
• qoffset_z : NIFTI_1_HEADER, NIFTI_2_HEADER
• quatern : IMG
• quatern_b : NIFTI_1_HEADER, NIFTI_2_HEADER
• quatern_c : NIFTI_1_HEADER, NIFTI_2_HEADER
• quatern_d : NIFTI_1_HEADER, NIFTI_2_HEADER