TY - GEN AU - Zompatori,M AU - Poletti,V AU - Battista,G AU - Diegoli,M TI - Bronchiolitis obliterans with organizing pneumonia (BOOP), presenting as a ring-shaped opacity at HRCT (the atoll sign). A case report SN - 0033-8362 PY - 1999///0819 KW - Cryptogenic Organizing Pneumonia KW - diagnostic imaging KW - Humans KW - Male KW - Middle Aged KW - Tomography, X-Ray Computed N1 - Publication Type: Case Reports; Journal Article ER -