Impression:
No fixed or reversible perfusion abnormalities detected at the achieved good cardiac workload.
Mild reduced tracer content in the inferior wall of attenuation type (arrows) .
Comments:
Mild reduced tracer "uptake" in the inferior wall is commonly seen in men with large chests. The inferior wall is furthest away from the detector, photons from the inferior wall thus travel longer distances and are attenuated,
giving the appearance of reduced uptake.
The phenomenon is often called diaphragmatic attenuation, which is a misnomer.
The diaphragm is very thin and does not couse the attenuation, the diaphragmatic portion of the LV ( the inferior wall)
is the affected, though.
The attenuation pattern is typically: smooth, homogeneous, gradually getting most pronounced toward the base.
Real perfusion abnormalities in the inferior wall are more abrupt, inhomogenous (bumpy), and often extend into posterior septum or the postero-lateral segments.
