(a) The GammaPod radiation unit without the cover showing the treatment couch at its near upright position with the breast cup locked in the opening. Also shown are the treatment doors, the support columns, and the base frame the unit rests on; (b) break-up view of the central section of the radiation unit showing the major inner components including the collimator, the source carrier, and the shielding body, all concentrically mounted.
(a) Shielding around the uppermost source at 18° when the beam is at the “off” position; (b) the cone angles of the collimators are designed to encompass the entire active source inside the cone.
(a) Vacuum assisted breast cup, showing the outer cup, inner cup, silicone flange, the cup-locking feature, and the localization frame. (b) The stereotactic localization frame detected from a set of CT images (square dots) and the theoretical locations by design.
Dose distribution of a single 25 mm shot around the isocenter. Upper panel shows the isodose distributions on the vertical and horizontal planes (patient's axial and coronal planes). Lower panel depicts the vertical (patient's PA direction) and lateral (patient's LR direction) dose profiles.
(a) Planned dose distributions on axial and coronal planes of a GammaPod treatment delivering 16 Gy to a 2.4 cm3 target. (b) DVHs of the target and normal breast tissues.
(a) Planned dose distributions on axial and coronal planes of a GammaPod APBI treatment delivering 8 Gy to a 151 cm3 target. (b) DVHs of the target and normal breast tissues.
(a) Planned dose distributions on axial and coronal planes of a GammaPod treatment simultaneously delivering 18 Gy to a 2.4 cm3 GTV and 9 Gy to the tumor bed, a 3D expansion from the GTV by 15 mm. (b) DVHs for GTV, tumor bed, and normal breast tissues.
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