| x-rays | roentgen rays |
|---|---|
| PLES | parallel-line equal space |
| PTA | parallel tubular arrays; parathyroid adenoma; percutaneous transluminal angioplasty; peroxidase-labe... |
| GR | gamma-rays; gastric resection; general research; generalized rash; glucocorticoid receptor; glutathi... |
| HED | hereditary ectodermal dysplasia; hydrotropic electron-donor; hypohidrotic ectodermal dysplasia; unit... |