Background: Children with minor head injury have a low, but serious risk of traumatic intracranial haemor­rhage. Medical research on criteria for head computerized tomo­graphy (CT) examinations for children is still inconclusive, because CT scanning is required to identify severe traumatic head injury, including acute epidural haematoma. However, radiation exposure is also an important problem.

From the medical perspective the decision to take neuro-imaging, including CT examination, for children with minor head injury must be made carefully, because of the possibility of negative impact on cognitive abilities or an increased risk of cancer from ionizing radiation.

From the legal perspective, when a pediatric patient with a minor head injury who did not have a CT head examination performed at the discretion of a doctor, but died several hours later from a traumatic intra­cranial haemorrhage, the doctor who had failed to order the head CT examination could be sued for medical malpractice. On the other hand, even if decreased cognitive abilities or an increased cancer risk occur more than a decade after that radiation exposure in a patient who had a head CT examina­tion during childhood because of minor head trauma, a doctor who ordered the CT examination is not at risk of being sued for medical malpractice.

Conclusion: A balanced judgment between medical and legal problems of medical care must be made. In other words, medical issues related to society, like the criteria for the CT scanning of children with a minor head injury, must be considered carefully.

I had reported in this journal (Vol. 2 No. 1), the prognostic prediction of delinquency during the time of compulsory education with check list made by statistical operation of Rorschach protocols of pre-school children.

This paper tries to check the usefulness of prediction by blind analysis of Rorschach protocols of pre-school children.

The results of over all evaluations predicted future delinquents with 0.1% level by X² test. Thirty-three children who fitted the prediction were analysed by the Schachtel’s table, and seventeen personality traits which were concerned with delinquencies were found.

Some sample cases were illustrated. They were given the Rorschach test every year from six years old to twelve years old, and in fifteen years old.

Among them, K. N. who had been predicted to become delinquent and really became delinquent; YO who had been predicted to become delinquent and did not become delinquent; and J. T. who had been predicted not to become delinquent and really did not become delinquent.

Correlation between changes of protocols and delinquencies was checked by blind method. Though they fitted realities, they needed support of environmental factors in order to prognosticate more accurately.