Imaging Guidelines for Older Adults with Back Pain

Clinical Context and Imaging Recommendations

The American College of Radiology recommends MRI without IV contrast as the most appropriate initial imaging study for older adults with back pain, due to its superior soft tissue resolution to identify compression fractures, marrow edema, cord compression, and malignancy 1, 2, 3
Older adults (>65 years) have a high risk for osteoporotic compression fractures even with minimal or no trauma, and an increased prevalence of malignancy requiring earlier detection 1, 4, 5
The American College of Radiology identifies advanced age as a red flag warranting consideration of early imaging, unlike younger adults where conservative management without imaging is standard 1, 4, 5

MRI identifies compression fractures even when radiographs are negative, detects marrow edema to determine fracture acuity, and is superior for soft tissue evaluation including cord signal abnormality, canal compromise, and nerve root compression 1, 2, 3
CT without IV contrast is complementary, not primary, as it better depicts osseous detail but misses marrow pathology and soft tissue abnormalities 2, 3, 7
CT is appropriate when MRI is contraindicated or for presurgical planning to assess bony anatomy 3, 7

For a standard older adult with back pain (no red flags beyond age), MRI thoracic/lumbar spine without IV contrast is usually appropriate 1, 2, 3
For red flags present (cancer, infection, immunosuppression), MRI without and with IV contrast is the initial modality of choice 2, 3, 7
For myelopathy or radiculopathy, MRI without IV contrast is usually appropriate to evaluate compressive etiologies 1, 3
For post-radiograph showing fracture/deformity, both MRI (without ± with contrast) and CT without contrast are usually appropriate as complementary studies 2, 3, 7

Do not delay imaging if myelopathy signs emerge, as this requires immediate MRI 6
Do not order CT with IV contrast alone, as there is no literature supporting this for initial assessment of back pain 1, 2, 3
Do not assume radiographs rule out fracture, as MRI or bone scan may be needed to age fracture acuity even with negative plain films 2, 3