Number of imaging centers.

No definition available.

Percentage of investment in unconsolidated affiliate.

No definition available.

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
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