### photograph:

Radiograph
* allow for evaluation of the bones to ensure that they are formed completely.
* also allow re-examinations as required to assess healing, progression of disease, etc.
* are an asset to dental diagnosis and treatment only when interpreted correctly.
* are an important part of evaluating the laminitic horse
  - laminitis therapy
  - necessary to determine if the bones have gone on to ossify normally
  - the least sensitive method of diagnosis
* demonstrate generalized cardiomegaly with marked left atrial enlargement.
* frequently demonstrate colonic wall thickening and luminal narrowing.
* give practitioners the ability to see old skull fractures.
* often belie the extension of medullary bone damage because of the density of the cortex
  - show changes that appear more severe than clinical findings
* rely on the different densities of various parts of the body.
* remain the standard for documentation of scoliosis.
* reveal a prominent osteophyte on the metatarsal head
  - interstitial pattern in caudal lung lobes
  - multisegmental collapse, spondylosis, osteoporosis, and hypermobile segments
* show bone spurs trying to span the disc space between the vertebra.
* show dorsal osteophytes and joint space narrowing
  - with advanced degenerative changes
  - increased radio-opacity around molar area
  - sclerosis and slight expansion of the medial one-third of the clavicle
  - two dimensional representation of three dimensional structures
* usually show multiple nodules with or without cavitation, bilaterally.
+ Smilodon, null, Teeth and jaws: Fossils :: Machairodonts
  * Smilodon' is most famous for its relatively long canines, which are the longest  found in the saber-toothed cats, at about  long in the largest species 'Smilodon populator'. These canine teeth were slender and had fine serrations. They were fragile and could not have bitten into bone. Therefore, the cats did not use their long teeth to take down prey. Only when their prey was subdued did they use their teeth. Radiographs reveal exceptional forelimb strength in the sabertooth cat, 'Smilodon fatalis'.

### photograph | radiograph:

Abdominal radiograph
* are generally non-diagnostic for the vast majority of cases
  - normal, without any evidence of cystic or renal calculi
* demonstrate free air in cases of intestinal perforation.

Chest radiography
* contributes relatively little to the diagnosis of acute pericarditis.
* is indicated to detect ARDS in patients with pulmonary symptoms
  - only sensitive for the late stages of cardiovascular disease
  - useful in evaluating hyperinflation
* shows bilateral diffuse interstitial infiltrates.

Plain radiograph
* are useful in detecting lyric or plastic lesions from bone metastasis
  - usually negative in a patient with pulmonary embolism
* show the tumor is adjacent to the bone rather than arising from it.

Sequential photograph
* record a frog's growth over a period of weeks.
* show how a puppy grows and changes over a period of months.

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Still
* are apparatus
  - bands
  - pictures
* come in all sizes, shapes and materials of construction.
* vary in size, depending on the amount of purified water they produce.
* work by boiling water in a large chamber, producing steam which enters a condenser.
  * A 'still' tool used to clean a liquid. It does this by first boiling the liquid and turning it into a gas. This gas is then cooled, changing it back into liquid. Stills get their name from the word di'still'ation. Distillation is the process of boiling and cooling a liquid to purify it. Stills are most often used to create alcohol, but they can also be used with any liquid. Some examples are medicines and perfumes.