RT Journal Article SR Electronic T1 The Severity of Pulmonary Emphysema Investigated with Fractal Analysis: Regional Dependence JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 177 OP 178 VO 42 IS 1 A1 Chung, Hsiao-Wen YR 2001 UL http://jnm.snmjournals.org/content/42/1/177.abstract AB