The imaging algorithm and imaging examples for most common conditions in neonatal obstructive uropathy (ureteropelvic junction obstruction, obstructive megaureter, posterior urethral valve and stone disease) will be presented and discussed. Imaging urinary tract obstruction is a common query in paediatric uroradiology. The submitted infants have increased by fetal screening ultrasound (US). With the advent of more conservative treatment approaches the task of imaging is not only to establish the diagnosis, but also to identify those kidneys as early as possible which will deteriorate and lose function and/or growth potential and thus benefit from surgery. For these, however, there is at present no reliable a-priori pro-futuro assessment in spite of all modern techniques such as diuretic MR-Urography (MRU). Thus, often repeated follow-up imaging is necessary to monitor the development. Imaging usually starts with US, additionally complemented by diuretic renal scintigraphy and/or MRU; voiding cystourethrography (VCUG) is used for detection of vesicoureteral reflux (VUR). The frequency and timing of investigations as well as the detailed protocol vary within institutions, partially also because of different criteria used for indicating surgery. Intravenous urography (IVU) has practically vanished for this query; apart from few exceptions, the "Whitaker test" is today also seldom performed only for complicated cases (e.g., peri-operatively).