Factors that change our brains; The APA’s stance on neuroimaging

The APA’s stance on neuroimaging

Can anyone in the modern world argue that the brain is irrelevant to psychiatry? Yet surprisingly, in September 2018, the American Psychiatric Association (APA) officially declared that neuroimaging of the brain has no clinical value in psychiatry.¹

Unfortunately, the APA focused almost exclusively on functional magnetic resonance imaging (fMRI) and neglected an extensive library of studies of single-photon emission computed tomography (SPECT) and positron emission tomography (PET). The APA’s position on neuroimaging is as follows^1,2:

1. A neuroimaging finding must have a sensitivity and specificity (S/sp) of no less than 80%.
2. The psychiatric imaging literature does not support using neuroimaging in psychiatric diagnostics or treatment.
3. Neuroimaging has not had a significant impact on the diagnosis and treatment of psychiatric disorders.

The APA set unrealistic standards for biomarkers in a field that lacks pathologic markers of specific disease entities.³ Moreover, numerous widely used tests fall below the APA’s unrealistic S/sp cutoff, including the Hamilton Depression Rating Scale,⁴ Zung Depression Scale,⁵ the clock drawing test,⁶ and even the chest X-ray.³ Curiously, numerous replicated SPECT and PET studies were not included in the APA’s analysis.^1-3 For example, in a study of 196 veterans, posttraumatic stress disorder was distinguished from traumatic brain injury with an S/sp of 0.92/0.85.^7,8 Also, fluorodeoxyglucose (FDG)-PET has an S/sp of 0.84/0.74 in differentiating patients with Alzheimer’s disease from controls, while perfusion SPECT, using multi-detector cameras, has an S/sp of 0.93/0.84.^3,9 Moreover, both FDG-PET and SPECT can differentiate other forms of dementia from Alzheimer’s disease, yielding an additional benefit compared to amyloid imaging alone.^2,9 As President of the International Society of Applied Neuroimaging, I suggest neuroimaging should not be feared. Neuroimaging does not replace the diagnostician; rather, it aids him/her in a complex case.

Theodore A. Henderson, MD, PhD
President
Neuro-Luminance Brain Health Centers, Inc.
Denver, Colorado
Director
The Synaptic Space
Vice President
The Neuro-Laser Foundation
President
International Society of Applied Neuroimaging
Centennial, Colorado

Disclosure
The author has no ownership in, and receives no remuneration from, any neuroimaging company.

References
1. First MB, Drevets WC, Carter C, et al. Clinical applications of neuroimaging in psychiatric disorders. Am J Psychiatry. 2018:175:915-916.
2. First MB, Drevets WC, Carter C, et al. Data supplement for Clinical applications of neuroimaging in psychiatric disorders. Am J Psychiatry. 2018;175(suppl).
3. Henderson TA. Brain SPECT imaging in neuropsychiatric diagnosis and monitoring. EPatient. http://nmpangea.com/2018/10/09/738/. Published 2018. Accessed May 31, 2019.
4. Bagby RM, Ryder AG, Schuller DR, et al. The Hamilton Depression Rating Scale: has the gold standard become a lead weight? Am J Psychiatry. 2004;161(12):2163-2177.
5. Biggs JT, Wylie LT, Ziegler VE. Validity of the Zung Self-rating Depression Scale. Br J Psychiatry. 1978;132:381-385.
6. Seigerschmidt E, Mösch E, Siemen M, et al. The clock drawing test and questionable dementia: reliability and validity. Int J Geriatr Psychiatry. 2002;17(11):1048-1054.
7. Raji CA, Willeumier K, Taylor D, et al. Functional neuroimaging with default mode network regions distinguishes PTSD from TBI in a military veteran population. Brain Imaging Behav. 2015;9(3):527-534.
8. Amen DG, Raji CA, Willeumier K, et al. Functional neuroimaging distinguishes posttraumatic stress disorder from traumatic brain injury in focused and large community datasets. PLoS One. 2015;10(7):e0129659. doi: 10.1371/journal.pone.0129659.
9. Henderson TA. The diagnosis and evaluation of dementia and mild cognitive impairment with emphasis on SPECT perfusion neuroimaging. CNS Spectr. 2012;17(4):176-206.