TY - GEN AU - Graham,Michael M TI - Reply: ventilation-perfusion scanning: stuck in a rut, perhaps, but the road ahead is not so clear SN - 1535-5667 PY - 2015///0130 KW - Humans KW - Lung KW - diagnostic imaging KW - Radionuclide Imaging KW - Ventilation-Perfusion Ratio N1 - Publication Type: Letter; Comment UR - https://doi.org/10.2967/jnumed.114.149047 ER -