The ornamental design for a portable enclosed probemagneticresonance instrument, as shown and described.
FIG. 1 is a front perspective view of the portable enclosed probe magnetic resonance instrument;
FIG. 2 is a left side perspective view thereof;
FIG. 3 is a right side perspective view thereof;
FIG. 4 is a back perspective view thereof; and,
FIG. 5 is a top perspective view thereof.
The broken lines in the drawing views are included for the purpose of illustrating portions of the portable enclosed magnetic resonance instrument that form no part of the claimed design.