{'fraction_non_alphanumeric': 0.027727546714888487, 'fraction_numerical': 0.006630500301386378, 'mean_word_length': 5.434108527131783, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 1, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
[Change of brain structure imaging of long-term withdrawal of methamphetamine-dependent patients].

OBJECTIVE
To explore the characteristics of brain structure in patients with long-term withdrawal of methamphetamine-dependence.  Methods: A total of 44 patients with withdrawal of methamphetamine-dependent for more than 14 months were recruited, who met the diagnostic criteria for substance dependence in the fifth edition of the American Mental Disorders Diagnostic and Statistical Manual (DSM-V), and 40 healthy subjects were used as the control. In addition to the general scale of drug-relevant survey, the subjects received the 3.0T magnetic resonance high-resolution scan. The voxel-based morphometric measurements for the subject's brain gray volume were conducted.  Results: There was no significant difference in age, education, smoking and alcohol consumption between the methamphetamine-dependent withdrawal group and the control group (P>0.05). The volumes for the bilateral cerebellum, the left side of temporal gyrus and the right side of the lingual gyrus in the methamphetamine-dependent withdrawal group were increased than those in the control group. The volumes for the bilateral lingual gyrus and bilateral cuneus in the methamphetamine-dependent withdrawal group were decreased than those in the control group. The volumes of left of cuneus and cerebellum were positively correlated with the duration of abstinence.  Conclusion: After long-term abstinence, although the patients still show abnormal brain structure, their behavior and cognitive function is improved. The cerebral nerve structural is recovered from long-term abstinence.