Table 2 Block search in medline (Pubmed), with chosen search terms and the combined block search

Controlled Vocabulary:

“Elasticity Imaging Techniques“[Mesh]

AND

“Magnetic Resonance

Imaging“[Mesh]

Free text:

Elastogram*[tw]) AND (MR[tw] OR MRI[tw] OR magnetic resonance image*[tw])

MRE[tw]

Magnetic resonance

Elastograph*[tw]

Controlled Vocabulary:

“Psoas Muscles“[Mesh]

“Sacrum“[Mesh]

“Lumbar Vertebrae“[Mesh]

“Lumbosacral Region“[Mesh]

“Low Back Pain“[Mesh]

Free text:

Psoas Muscle*[tw]

loin*[tw]

Lumbosacral[tw]

Low back[tw]

Lower back[tw]

Lumbago[tw]

Sacrum*[tw]

Sacra[tw]

Sacral[tw]

Lumbar[tw]

Block 1 and 2 combined with “AND”

(((((“Elasticity Imaging Techniques“[Mesh]) OR (elastograph*[tw])) OR (elastogram*[tw])) AND ((((“Magnetic Resonance Imaging“[Mesh]) OR (MR[tw])) OR (MRI[tw])) OR (magnetic resonance image*[tw]))) OR ((MRE[tw]) OR (magnetic resonance elastograph*[tw]))) AND ((((((((((((((“Psoas Muscles“[Mesh]) OR (“Sacrum“[Mesh])) OR (“Lumbar Vertebrae“[Mesh])) OR (“Lumbosacral Region” [Mesh])) OR (“Low Back Pain“[Mesh])) OR (Psoas Muscle* [tw])) OR (loin*[tw])) OR (Low back[tw])) OR (Lower back[tw])) OR (Lumbago[tw])) OR (Sacra[tw])) OR (Lumbar[tw])) OR (Sacral[tw])) OR (Lumbosacral[tw]))