. The American journal of roentgenology, radium therapy and nuclear medicine . .r-ray work, one unfortunatelv doesnot find them to be always so. They are sub-ject to extreme variations and anomalies. Fn^m the study of the various roent-genograms of normal renal pelves and blood-vessels, the writer is prepared so far in hisinvestigation to give the following findings: First, that work upon normal kidneys ofadults, infants, and feti reveals that thereis always a constant dissimilarily in capacity,size and shape of the pelves and the numberof calyces, not only between two differentpersons, but al
. The American journal of roentgenology, radium therapy and nuclear medicine . .r-ray work, one unfortunatelv doesnot find them to be always so. They are sub-ject to extreme variations and anomalies. Fn^m the study of the various roent-genograms of normal renal pelves and blood-vessels, the writer is prepared so far in hisinvestigation to give the following findings: First, that work upon normal kidneys ofadults, infants, and feti reveals that thereis always a constant dissimilarily in capacity,size and shape of the pelves and the numberof calyces, not only between two differentpersons, but also between the two kidneysremoved from the same subject. Second, that the superimposition of theshadow of one or more calyces upon theother portion of the calyces and pelvis willthrow a shadow which often resemble a stonein the pelvis. Again, if the cup-like terminaldepression of the minor calyx happens to bea very deep one, it will produce a ring-likeshadow of less density than the mainshadow, and this may be mistaken for a 7o6 Roentgenological Studies of Injected Kidneys.
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