A method and apparatus are provided for forming a magnetic resonance angiographic
image of a human body. A plurality of spatially non-selective radio-frequency pulses
and a plurality of different combinations of phase-encoding gradients are applied
to the human body, that are temporally non-coincident with the radio-frequency
pulses and where each combination includes a pulse value in a slice selective direction
and a pulse value in an in-plane direction and magnetic resonance imaging data
are detected. A slice processor and/or a thickness processor identify the presence,
location and/or thickness of a body portion of the human body. Identification of
a body portion in a first imaging volume becomes the basis of application of a
second plurality of spatially non-selective radio-frequency pulses to a second
imaging volume of the human body.