TY - JOUR T1 - The Severity of Pulmonary Emphysema Investigated with Fractal Analysis: Regional Dependence JF - Journal of Nuclear Medicine JO - J Nucl Med SP - 177 LP - 178 VL - 42 IS - 1 AU - Hsiao-Wen Chung Y1 - 2001/01/01 UR - http://jnm.snmjournals.org/content/42/1/177.abstract N2 - ER -