Despite the high sensitivity of bone scans the specificity is still relatively low, due obviously to the low resolution of scan images. Professor Bahk's original concept of "more anatomy through pinhole magnification for higher specificity in scan diagnosis" was weIl presented in his article entitled "Pinhole Collimator Sein tigraphy in Differential Diagnosis of Metastasis, Fracture, and Infections of the Spine" which waspublished in the JournalofNuclear Medicine in April 1987and successive articles, with the most recent ones appearing in the same journal and in the European Journal ofNuclear Medicine this year. Since the early 1980she has been fighting a lonely battle, but now, after more than a decade of laborious compilation and systematic analysis of a tremendous amount of clinical material, he has published a truly state-of-the-art work on pinhole bone scintigraphy cor related with radiography. This is clearly an innovative and holistic work on the scan diagnosis of skeletal diseases, one which will open new horizons. Professor Bahk has keen theoretical insight into the essentiality of good image resolution to basically improve bone scan diagnosis and a well-balanced technical sense of optimization of scan parameters to savetime without losing image quali ty, These two aspects of his contemplation have been beautifully borne out in this valuable accomplishment which has crystallized out of half of a lifetime of creative work.