Original sentence: PET, SPECT and other scans have been used.Physicians do not generally order psychological testing in order to make the diagnosis of ADHD, but some doctors use this kind of assessment to avoid over-diagnosis and to reveal other causes of the difficulties.The interview also needs to rule out as much as possible other conditions which can cause attention problems, including immaturity, mental retardation, subtle learning problems, boredom, oppositionality, drug abuse, sleep deprivation, tics, Pervasive Developmental Disorders, depression, anxiety, allergies, epilepsy, and psychosis.These are occasionally useful but authoritative guidelines suggest they are only justified when there is a specific question to be answered.They are usually unsuitable for very young children.They have not been used in most scientific studies
Edited sentence: However, these are not usually suitable for very young children.Neurometrics, PET scans, or SPECT scans have been used for a more objective diagnosis.Subjectivity of the analysis can be compounded by the fact that physicians generally need not order psychological testing in order to make the diagnosis of ADHD, but many doctors use this kind of assessment to avoid over-diagnosis and treatment.The interview also needs to rule out as much as possible other conditions which can cause attention problems, including immaturity, mental retardation, subtle learning problems, boredom, oppositionality, drug abuse, sleep deprivation, tics, pervasive developmental disorders,depression, anxiety, allergies, epilepsy, and psychosis.The process of obtaining referrals for such assessments is being promoted vigorously by the President's New Freedom Commission on Mental Health