11. It took a month before they could obtain the first radiographs . 12. Later on there arrived from Europe adequate tubes for taking radiographs . 13. Metastases often have a characteristic round appearance on chest radiograph . 14. Chest radiographs are the most common film taken in medicine. 15. Pneumonia and congestive heart failure are very commonly diagnosed by chest radiograph . 16. Horses undergoing venography have plain radiographs taken beforehand to allow for comparison. 17. Radiographs initially show layers of periosteal new bone formation with cortical thickening.18. This is a technique that provides moving projection radiographs of lower quality. 19. Most dislocations are apparent on radiographs showing incongruence of the glenohumeral joint. 20. X-rays and radiographs can also show evidence of the abnormality.