Table 3

Summary of recent relevant studies

Study	Radiological examination	Software	No. of patients	Strength	Weaknesses
Furuta, 20016	CT	National Institutes of Health Images	109	▸ Reproducibility tested ▸ Manual segmentation	▸ 2 mm thick slices ▸ References unclearly defined (lacrymal fossa)
Scolozzi and Jaques, 20087	CT	OsiriX	20	▸ 0.35 mm thick slices ▸ Manual segmentation	▸ References unclearly defined: lateral portion of the anterior slices are not defined
Ahn et al, 200827	CT	Infinitt Co.	35	▸ Manual segmentation	▸ 3 mm thick slices ▸ Reproducibility not tested
Scolozzi et al, 201023	CT	OsiriX	20	▸ 0.35 mm thick slices ▸ Manual segmentation	▸ References unclearly defined: lateral portion of the anterior slices are not defined
Saiepour et al, 201214	CT	Osirix	10	▸ 1.25 mm thick slices ▸ Manual segmentation	▸ References unclearly defined: lateral portion of the anterior slices are not defined